Dynamic filters on Windows

faltet · June 28, 2017, 11:44am

Hi,

I have been trying to give support to HDF5 on Windows for dynamically
loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no
success so far.

I basically have compiled the plugin with:

cl /I"C:\Program Files (x86)\blosc\include"

/I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c
/OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib"
/LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll
to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when I try to use a h5dump for
getting the data of an HDF5 with some datasets compressed with Blosc, I am
getting:

h5dump \tmp\carray1-blosc.h5

HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

}
}
}
}

When asking for more errors, I am getting a more informative message:

>h5dump --enable-error-stack \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line
2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line
3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open
directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in
HDF5 is looking at and 2) which name the DLL should have (as per manual, I
am using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll
with no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so as
to direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it
is of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5
backtrace of the plugin machinery would provide info about 1) which
directory it is looking at for finding the HDF5 plugin and 2) the name of
the DLL that it is trying to load.

Thanks in advance,

···

--
Francesc Alted

werner · June 28, 2017, 12:24pm

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under Windows, and this are the files as needed in the plugin directory that HDF5 looks for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

Werner

···

On 28.06.2017 13:44, Francesc Alted wrote:

Hi,

I have been trying to give support to HDF5 on Windows for dynamically loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no success so far.

I basically have compiled the plugin with:

> cl /I"C:\Program Files (x86)\blosc\include" /I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c /OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib" /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when I try to use a h5dump for getting the data of an HDF5 with some datasets compressed with Blosc, I am getting:

>h5dump \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

      }
   }
}

When asking for more errors, I am getting a more informative message:

>h5dump --enable-error-stack \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line 2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line 3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in HDF5 is looking at and 2) which name the DLL should have (as per manual, I am using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll with no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so as to direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it is of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5 backtrace of the plugin machinery would provide info about 1) which directory it is looking at for finding the HDF5 plugin and 2) the name of the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

werner · June 28, 2017, 12:31pm

Just to add:

under windows, the plugins need to start with lib as prefix. It's technically not required, but the HDF5 plugin loader expects that. So the liblz4.dll in my plugins dir is the LZ4 plugin,the libHDF5blosc.dll the blosc-filter; the blosc.dll is used by the blosc filter and needs to be in the same directory if compiled as dynamic library as well.

Werner

···

On 28.06.2017 14:24, Werner Benger wrote:

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under Windows, and this are the files as needed in the plugin directory that HDF5 looks for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

          Werner

On 28.06.2017 13:44, Francesc Alted wrote:

Hi,

I have been trying to give support to HDF5 on Windows for dynamically loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no success so far.

I basically have compiled the plugin with:

> cl /I"C:\Program Files (x86)\blosc\include" /I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c /OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib" /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when I try to use a h5dump for getting the data of an HDF5 with some datasets compressed with Blosc, I am getting:

>h5dump \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

      }
   }
}

When asking for more errors, I am getting a more informative message:

>h5dump --enable-error-stack \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line 2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line 3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in HDF5 is looking at and 2) which name the DLL should have (as per manual, I am using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll with no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so as to direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it is of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5 backtrace of the plugin machinery would provide info about 1) which directory it is looking at for finding the HDF5 plugin and 2) the name of the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter:https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

elvis.stansvik · June 28, 2017, 2:45pm

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under Windows,
and this are the files as needed in the plugin directory that HDF5 looks
for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

I'm doing the same, just with a small minor difference: My blosc is
built with the lz4 that is bundled in the blosc sources, so it's
compiled right into the blosc.dll. So I didn't need to ship
liblz4.dll.

Elvis

···

2017-06-28 14:24 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin
using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

          Werner

On 28.06.2017 13:44, Francesc Alted wrote:

Hi,

I have been trying to give support to HDF5 on Windows for dynamically
loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no
success so far.

I basically have compiled the plugin with:

cl /I"C:\Program Files (x86)\blosc\include"
/I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c
/OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib"
/LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin",
but when I try to use a h5dump for getting the data of an HDF5 with some
datasets compressed with Blosc, I am getting:

h5dump \tmp\carray1-blosc.h5

HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

      }
   }
}
}

When asking for more errors, I am getting a more informative message:

h5dump --enable-error-stack \tmp\carray1-blosc.h5

HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line
2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line
3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open
directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in HDF5
is looking at and 2) which name the DLL should have (as per manual, I am
using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll with
no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so as to
direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it is
of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5
backtrace of the plugin machinery would provide info about 1) which
directory it is looking at for finding the HDF5 plugin and 2) the name of
the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

faltet · June 28, 2017, 1:00pm

Hi Werner,

Right, what I was missing was basically moving the blosc.dll library into
the HDF5 plugin directory. I thought that putting blosc.dll in a directory
in the %PATH% was going to be enough, but apparently this is not the case
(I suppose this is a Windows trickery).

For what is worth, the name of the DLL plugin is not that important as I
have tried with libHDF5blosc.dll, libH5Zblosc.dll, H5Zblosc.dll and even
blosc_plugin.dll and all of them work. Apparently the HDF5 library tries
all the DLLs in the plugin directory and uses the one that registers the
necessary filter ID; pretty smart.

Thanks so much!

···

2017-06-28 14:31 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Just to add:

under windows, the plugins need to start with lib as prefix. It's
technically not required, but the HDF5 plugin loader expects that. So the
liblz4.dll in my plugins dir is the LZ4 plugin,the libHDF5blosc.dll the
blosc-filter; the blosc.dll is used by the blosc filter and needs to be in
the same directory if compiled as dynamic library as well.

        Werner

On 28.06.2017 14:24, Werner Benger wrote:

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under
Windows, and this are the files as needed in the plugin directory that
HDF5 looks for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin
using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

          Werner

On 28.06.2017 13:44, Francesc Alted wrote:

Hi,

I have been trying to give support to HDF5 on Windows for dynamically
loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no
success so far.

I basically have compiled the plugin with:

> cl /I"C:\Program Files (x86)\blosc\include" /I"C:\HDF_Group\HDF5\1.8.12\include"
libH5Zblosc.c blosc_filter.c /OUT:libH5Zblosc.dll /LD /link
/LIBPATH:"C:\Program Files (x86)\blosc\lib" /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib"
blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin",
but when I try to use a h5dump for getting the data of an HDF5 with some
datasets compressed with Blosc, I am getting:

>h5dump \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

      }
   }
}
}

When asking for more errors, I am getting a more informative message:

>h5dump --enable-error-stack \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
line 2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
line 3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\
hdfsrc\tools\lib\h5tools_dump.c line 1639 in h5tools_dump_simple_dset():
H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open
directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in
HDF5 is looking at and 2) which name the DLL should have (as per manual, I
am using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll
with no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so as
to direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it
is of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5
backtrace of the plugin machinery would provide info about 1) which
directory it is looking at for finding the HDF5 plugin and 2) the name of
the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <(225)%20578-4809> Fax.: +1 225 578-5362 <(225)%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <(225)%20578-4809> Fax.: +1 225 578-5362 <(225)%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

werner · June 28, 2017, 3:08pm

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under Windows,
and this are the files as needed in the plugin directory that HDF5 looks
for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

I'm doing the same, just with a small minor difference: My blosc is
built with the lz4 that is bundled in the blosc sources, so it's
compiled right into the blosc.dll. So I didn't need to ship
liblz4.dll.

Elvis

Actually that's the same for me, the liblz4.dll in that listing is actually the blosc-independent LZ4 compression filter itself.

Werner

···

On 28.06.2017 16:45, Elvis Stansvik wrote:

2017-06-28 14:24 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin
using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

           Werner

On 28.06.2017 13:44, Francesc Alted wrote:

Hi,

I have been trying to give support to HDF5 on Windows for dynamically
loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no
success so far.

I basically have compiled the plugin with:

cl /I"C:\Program Files (x86)\blosc\include"
/I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c
/OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib"
/LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin",
but when I try to use a h5dump for getting the data of an HDF5 with some
datasets compressed with Blosc, I am getting:

h5dump \tmp\carray1-blosc.h5

HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
    DATASET "carray" {
       DATATYPE H5T_STD_U8LE
       DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
       DATA {h5dump error: unable to print data

       }
    }
}

When asking for more errors, I am getting a more informative message:

h5dump --enable-error-stack \tmp\carray1-blosc.h5

HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
    DATASET "carray" {
       DATATYPE H5T_STD_U8LE
       DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
       DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
   #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 171 in H5Dread(): can't read data
     major: Dataset
     minor: Read failed
   #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 544 in H5D__read(): can't read data
     major: Dataset
     minor: Read failed
   #002:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line
2050 in H5D__chunk_read(): unable to read raw data chunk
     major: Low-level I/O
     minor: Read failed
   #003:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line
3405 in H5D__chunk_lock(): data pipeline read failed
     major: Data filters
     minor: Filter operation failed
   #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
     major: Data filters
     minor: Read failed
   #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 389 in H5PL_load(): search in paths failed
     major: Plugin for dynamically loaded library
     minor: Can't get value
   #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 812 in H5PL__find(): can't open directory
     major: Plugin for dynamically loaded library
     minor: Can't open directory or file
h5dump error: unable to print data

       }
    }
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
   #000:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
line 1639 in h5tools_dump_simple_dset(): H5Dread failed
     major: Failure in tools library
     minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open
directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in HDF5
is looking at and 2) which name the DLL should have (as per manual, I am
using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll with
no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so as to
direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it is
of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5
backtrace of the plugin machinery would provide info about 1) which
directory it is looking at for finding the HDF5 plugin and 2) the name of
the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

werner · June 28, 2017, 1:15pm

Hi Francesc,

it took me a while to figure out this detail, too, I had the blosc.dll in the PATH at first, and it seems to work under some circumstances but not others... not entirely clear to me when it needs to be in the PATH or in the calling's DLL's directory outside of the PATH.

There's some code in H5PL.c that checks for a lib prefix:

#ifndef __CYGWIN__
if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
(HDstrstr(dp->d_name, ".so") || HDstrstr(dp->d_name, ".dylib"))) {
#else
...

#endif

So I guess in your case that prefix check did not apply, whereas for me using gcc under windows it did. Thus it seems best for compatibility to keep the plugins named with lib- starting under Windows, once compiled that C code should not matter whether it was produced by GCC or MSC. Otherwise yes, the name does not matter indeed.

Werner

···

On 28.06.2017 15:00, Francesc Alted wrote:

Hi Werner,

Right, what I was missing was basically moving the blosc.dll library into the HDF5 plugin directory. I thought that putting blosc.dll in a directory in the %PATH% was going to be enough, but apparently this is not the case (I suppose this is a Windows trickery).

For what is worth, the name of the DLL plugin is not that important as I have tried with libHDF5blosc.dll, libH5Zblosc.dll, H5Zblosc.dll and even blosc_plugin.dll and all of them work. Apparently the HDF5 library tries all the DLLs in the plugin directory and uses the one that registers the necessary filter ID; pretty smart.

Thanks so much!

2017-06-28 14:31 GMT+02:00 Werner Benger <werner@cct.lsu.edu <mailto:werner@cct.lsu.edu>>:

    Just to add:

     under windows, the plugins need to start with lib as prefix. It's
    technically not required, but the HDF5 plugin loader expects that.
    So the liblz4.dll in my plugins dir is the LZ4 plugin,the
    libHDF5blosc.dll the blosc-filter; the blosc.dll is used by the
    blosc filter and needs to be in the same directory if compiled as
    dynamic library as well.

            Werner

    On 28.06.2017 14:24, Werner Benger wrote:

    Hi,

     I am using HDF5 with blosc dynamic plugin loading regularly
    under Windows, and this are the files as needed in the plugin
    directory that HDF5 looks for:

    HDF5Plugins $ ll
    total 1.2M
    -rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
    -rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
    -rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

    The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5
    plugin using that library.

    I'm using Mingw64, which is gcc 6.3 under MSYS2 .

              Werner

    On 28.06.2017 13:44, Francesc Alted wrote:

    Hi,

    I have been trying to give support to HDF5 on Windows for
    dynamically loading the Blosc plugin
    (https://github.com/Blosc/hdf5-blosc
    <https://github.com/Blosc/hdf5-blosc>), but no success so far.

    I basically have compiled the plugin with:

    > cl /I"C:\Program Files (x86)\blosc\include"
    /I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c
    blosc_filter.c /OUT:libH5Zblosc.dll /LD /link
    /LIBPATH:"C:\Program Files (x86)\blosc\lib"
    /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

    and then copied the libH5Zblosc.dll
    to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when I try to use a
    h5dump for getting the data of an HDF5 with some datasets
    compressed with Blosc, I am getting:

    >h5dump \tmp\carray1-blosc.h5
    HDF5 "\tmp\carray1-blosc.h5" {
    GROUP "/" {
       DATASET "carray" {
          DATATYPE H5T_STD_U8LE
          DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
          DATA {h5dump error: unable to print data

          }
       }
    }

    When asking for more errors, I am getting a more informative
    message:

    >h5dump --enable-error-stack \tmp\carray1-blosc.h5
    HDF5 "\tmp\carray1-blosc.h5" {
    GROUP "/" {
     DATASET "carray" {
    DATATYPE H5T_STD_U8LE
    DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
    DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
    #000:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
    line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
    #001:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
    line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
    #002:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
    line 2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
    #003:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
    line 3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
    #004:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
    line 1349 in H5Z_pipeline(): required filter 'blosc' is not
    registered
    major: Data filters
    minor: Read failed
    #005:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
    line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
    #006:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
    line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
    h5dump error: unable to print data

    }
       }
    }
    H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
    #000:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
    line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

    I suppose the meaningful part is here:

    10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't
    open directory

    b
    ut I have no clues on 1) what directory the dynamic plugin
    machinery in HDF5 is looking at and 2) which name the DLL
    should have (as per manual, I am using libH5Zblosc.dll, but I
    have tried with H5Zblosc.dll and blosc.dll with no success).

    I have also tried to use the HDF5_PLUGIN_PATH environment
    variable, so as to direct the plugin machinery in HDF5 to look
    into the specific
    %ALLUSERSPROFILE%/hdf5/lib/plugin
     place,
    but no luck.

    I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it is of any help, I am using Windows 10 64 bit.

    As a suggestion, it may help to debug situations like this if
    the HDF5 backtrace of the plugin machinery would provide info
    about 1) which directory it is looking at for finding the HDF5
    plugin and 2) the name of the DLL that it is trying to load.

    Thanks in advance,

    -- Francesc Alted

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter:https://twitter.com/hdf5

    -- ___________________________________________________________________________
    Dr. Werner Benger Visualization Research
    Center for Computation & Technology at Louisiana State University (CCT/LSU)
    2019 Digital Media Center, Baton Rouge, Louisiana 70803
    Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter:https://twitter.com/hdf5

    -- ___________________________________________________________________________
    Dr. Werner Benger Visualization Research
    Center for Computation & Technology at Louisiana State University (CCT/LSU)
    2019 Digital Media Center, Baton Rouge, Louisiana 70803
    Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

elvis.stansvik · June 28, 2017, 3:17pm

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under

Windows,

and this are the files as needed in the plugin directory that HDF5 looks
for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

I'm doing the same, just with a small minor difference: My blosc is
built with the lz4 that is bundled in the blosc sources, so it's
compiled right into the blosc.dll. So I didn't need to ship
liblz4.dll.

Elvis

Actually that's the same for me, the liblz4.dll in that listing is

actually the blosc-independent LZ4 compression filter itself.

Aha, I see.

Elvis

Werner

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin
using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

Werner

Hi,

I have been trying to give support to HDF5 on Windows for dynamically
loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no
success so far.

I basically have compiled the plugin with:

cl /I"C:\Program Files (x86)\blosc\include"
/I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c
/OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files

(x86)\blosc\lib"

/LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to

"%ALLUSERSPROFILE%/hdf5/lib/plugin",

but when I try to use a h5dump for getting the data of an HDF5 with some
datasets compressed with Blosc, I am getting:

h5dump \tmp\carray1-blosc.h5

HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
    DATASET "carray" {
       DATATYPE H5T_STD_U8LE
       DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
       DATA {h5dump error: unable to print data

       }
    }
}
}

When asking for more errors, I am getting a more informative message:

h5dump --enable-error-stack \tmp\carray1-blosc.h5

HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
    DATASET "carray" {
       DATATYPE H5T_STD_U8LE
       DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
       DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
   #000:

C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c

line 171 in H5Dread(): can't read data
     major: Dataset
     minor: Read failed
   #001:

C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c

line 544 in H5D__read(): can't read data
     major: Dataset
     minor: Read failed
   #002:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c

line

2050 in H5D__chunk_read(): unable to read raw data chunk
     major: Low-level I/O
     minor: Read failed
   #003:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c

line

3405 in H5D__chunk_lock(): data pipeline read failed
     major: Data filters
     minor: Filter operation failed
   #004:

C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c

line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
     major: Data filters
     minor: Read failed
   #005:

C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c

line 389 in H5PL_load(): search in paths failed
     major: Plugin for dynamically loaded library
     minor: Can't get value
   #006:

C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c

line 812 in H5PL__find(): can't open directory
     major: Plugin for dynamically loaded library
     minor: Can't open directory or file
h5dump error: unable to print data

       }
    }
}
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
   #000:

C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c

line 1639 in h5tools_dump_simple_dset(): H5Dread failed
major: Failure in tools library
minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open
directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in

HDF5

is looking at and 2) which name the DLL should have (as per manual, I am
using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll

with

no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so

as to

direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it

is

of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5
backtrace of the plugin machinery would provide info about 1) which
directory it is looking at for finding the HDF5 plugin and 2) the name

of

···

Den 28 juni 2017 5:10 em skrev "Werner Benger" <werner@cct.lsu.edu>:

On 28.06.2017 16:45, Elvis Stansvik wrote:

2017-06-28 14:24 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

On 28.06.2017 13:44, Francesc Alted wrote:
the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--

___________________________________________________________________________

Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University

(CCT/LSU)

2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--

___________________________________________________________________________

Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University

(CCT/LSU)

2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

faltet · June 28, 2017, 5:01pm

Werner, I think the lib- prefix does not apply to my case because I am
using VS2015 for compiling the libraries. But agreed that HDF5 taking
different conventions depending on whether a MSVC or GCC-based is a bit
confusing.

BTW, although the h5dump can read blosc files with the plugin, ptrepack
cannot create them on Windows:

C:\Users\faltet>h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5
carray1-repack.h5
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000:
C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001:
C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002:
C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000:
C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001:
C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002:
C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
h5repack error: <carray1-blosc.h5>: Could not copy data to:
carray1-repack.h5

I have tested with both 1.10.1 and 1.8.19 (above).

whereas it works perfectly well on a Mac box:

Francescs-MacBook-Pro:PyTables faltet$ h5repack -f
UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
Francescs-MacBook-Pro:PyTables faltet$ h5ls -v carray1-repack.h5
Opened "carray1-repack.h5" with sec2 driver.
carray Dataset {200/218, 300/300}
    Location: 1:800
    Links: 1
    Chunks: {218, 300} 65400 bytes
    Storage: 60000 logical bytes, 58 allocated bytes, 103448.28%
utilization
    Filter-0: blosc-32001 {2, 2, 1, 65400, 9, 1, 5, 5}
    Type: native unsigned char

Any hints?

···

2017-06-28 15:15 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Hi Francesc,

it took me a while to figure out this detail, too, I had the blosc.dll in
the PATH at first, and it seems to work under some circumstances but not
others... not entirely clear to me when it needs to be in the PATH or in
the calling's DLL's directory outside of the PATH.

There's some code in H5PL.c that checks for a lib prefix:

#ifndef __CYGWIN__
        if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
                (HDstrstr(dp->d_name, ".so") || HDstrstr(dp->d_name,
".dylib"))) {
#else
...

#endif

So I guess in your case that prefix check did not apply, whereas for me
using gcc under windows it did. Thus it seems best for compatibility to
keep the plugins named with lib- starting under Windows, once compiled that
C code should not matter whether it was produced by GCC or MSC. Otherwise
yes, the name does not matter indeed.

         Werner

On 28.06.2017 15:00, Francesc Alted wrote:

Hi Werner,

Right, what I was missing was basically moving the blosc.dll library into
the HDF5 plugin directory. I thought that putting blosc.dll in a directory
in the %PATH% was going to be enough, but apparently this is not the case
(I suppose this is a Windows trickery).

For what is worth, the name of the DLL plugin is not that important as I
have tried with libHDF5blosc.dll, libH5Zblosc.dll, H5Zblosc.dll and even
blosc_plugin.dll and all of them work. Apparently the HDF5 library tries
all the DLLs in the plugin directory and uses the one that registers the
necessary filter ID; pretty smart.

Thanks so much!

2017-06-28 14:31 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Just to add:

under windows, the plugins need to start with lib as prefix. It's
technically not required, but the HDF5 plugin loader expects that. So the
liblz4.dll in my plugins dir is the LZ4 plugin,the libHDF5blosc.dll the
blosc-filter; the blosc.dll is used by the blosc filter and needs to be in
the same directory if compiled as dynamic library as well.

        Werner

On 28.06.2017 14:24, Werner Benger wrote:

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under
Windows, and this are the files as needed in the plugin directory that
HDF5 looks for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin
using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

          Werner

On 28.06.2017 13:44, Francesc Alted wrote:

Hi,

I have been trying to give support to HDF5 on Windows for dynamically
loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no
success so far.

I basically have compiled the plugin with:

> cl /I"C:\Program Files (x86)\blosc\include"
/I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c
/OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib"
/LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin",
but when I try to use a h5dump for getting the data of an HDF5 with some
datasets compressed with Blosc, I am getting:

>h5dump \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

      }
   }
}
}

When asking for more errors, I am getting a more informative message:

>h5dump --enable-error-stack \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
line 2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
line 3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open
directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in
HDF5 is looking at and 2) which name the DLL should have (as per manual, I
am using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll
with no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so as
to direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it
is of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5
backtrace of the plugin machinery would provide info about 1) which
directory it is looking at for finding the HDF5 plugin and 2) the name of
the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <(225)%20578-4809> Fax.: +1 225 578-5362 <(225)%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

werner · June 28, 2017, 8:25pm

Francesc, I am getting this message, which is correct since I don't have it compiled with zstd.

h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 myRGBA.f5 myRGBA-out.f5 HDF5-DIAG: Error detected in HDF5 (1.8.17) thread 10592: #000: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5D.c line 426 in H5Dclose(): can't decrement count on dataset ID major: Dataset minor: Unable to decrement reference count #001: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c line 1549 in H5I_dec_app_ref_always_close(): can't decrement ID ref count major: Object atom minor: Unable to decrement reference count #002: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c line 1491 in H5I_dec_app_ref(): can't decrement ID ref count major: Object atom minor: Unable to decrement reference count #003: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 1544 in H5D_close(): unable to destroy chunk cache major: Dataset minor: Unable to release object #004: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 5164 in H5D__chunk_dest(): unable to flush one or more raw data chunks major: Low-level I/O minor: Unable to flush data from cache #005: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2641 in H5D__chunk_cache_evict(): cannot flush indexed storage buffer major: Low-level I/O minor: Write failed #006: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2528 in H5D__chunk_flush_entry(): output pipeline failed major: Data filters minor: Filter operation failed #007: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c line 1412 in H5Z_pipeline(): filter returned failure major: Data filters minor: Write failed #008: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c line 190 in blosc_filter(): this Blosc library does not have support for the 'zstd' compressor, but only for: blosclz,lz4,lz4hc,zlib major: Data filters minor: Callback failed #009: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 1507 in H5D_close(): unable to flush cached dataset info major: Dataset minor: Write failed #010: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 2438 in H5D__flush_real(): unable to flush raw data major: Dataset minor: Unable to flush data from cache #011: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2112 in H5D__chunk_flush(): unable to flush one or more raw data chunks major: Dataset minor: Unable to flush data from cache #012: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2528 in H5D__chunk_flush_entry(): output pipeline failed major: Data filters minor: Filter operation failed #013: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c line 1412 in H5Z_pipeline(): filter returned failure major: Data filters minor: Write failed #014: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c line 190 in blosc_filter(): this Blosc library does not have support for the 'zstd' compressor, but only for: blosclz,lz4,lz4hc,zlib major: Data filters minor: Callback failed h5repack error: <myRGBA.f5>: Could not copy data to: myRGBA-out.f5

But when using LZ4HC as filter it works fine:

Wrk $ h5repack -f UD=32001,8,0,0,0,0,0,9,1,2 myRGBA.f5 myRGBA-out.f5

Wrk $ ll

-rw-r--r-- 1 Wrk None 12M Jan 25 16:43 myRGBA.f5

-rw-r--r-- 1 Wrk None 5.0M Jun 28 22:18 myRGBA-out.f5

I'm using 1.8.17, evidently.

Btw, the restriction with the lib-prefix has the advantage that the HDF5 plugin loader does not look at DLL's such as "blosc.dll", it would not even try to load it as a plugin. Just something better than "lib" would probably be preferable, and independent of platform and compiler. I guess in your version it even tries to load the blosc.dll itself as a plugin - which could lead to issues if such a plugin would contain some startup code like global c++ constructors or code in DllMain which does "something". That's unlikely to be related to your problem though, I don't see from the output what the problem could be, it works for me.

Werner

···

On 28.06.2017 19:01, Francesc Alted wrote:

Werner, I think the lib- prefix does not apply to my case because I am using VS2015 for compiling the libraries. But agreed that HDF5 taking different conventions depending on whether a MSVC or GCC-based is a bit confusing.

BTW, although the h5dump can read blosc files with the plugin, ptrepack cannot create them on Windows:

C:\Users\faltet>h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
h5repack error: <carray1-blosc.h5>: Could not copy data to: carray1-repack.h5

I have tested with both 1.10.1 and 1.8.19 (above).

whereas it works perfectly well on a Mac box:

Francescs-MacBook-Pro:PyTables faltet$ h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
Francescs-MacBook-Pro:PyTables faltet$ h5ls -v carray1-repack.h5
Opened "carray1-repack.h5" with sec2 driver.
carray Dataset {200/218, 300/300}
Location: 1:800
Links: 1
Chunks: {218, 300} 65400 bytes
Storage: 60000 logical bytes, 58 allocated bytes, 103448.28% utilization
Filter-0: blosc-32001 {2, 2, 1, 65400, 9, 1, 5, 5}
Type: native unsigned char

Any hints?

2017-06-28 15:15 GMT+02:00 Werner Benger <werner@cct.lsu.edu <mailto:werner@cct.lsu.edu>>:

    Hi Francesc,

     it took me a while to figure out this detail, too, I had the
    blosc.dll in the PATH at first, and it seems to work under some
    circumstances but not others... not entirely clear to me when it
    needs to be in the PATH or in the calling's DLL's directory
    outside of the PATH.

    There's some code in H5PL.c that checks for a lib prefix:

    #ifndef __CYGWIN__
            if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
                    (HDstrstr(dp->d_name, ".so") ||
    HDstrstr(dp->d_name, ".dylib"))) {
    #else
    ...

    #endif

    So I guess in your case that prefix check did not apply, whereas
    for me using gcc under windows it did. Thus it seems best for
    compatibility to keep the plugins named with lib- starting under
    Windows, once compiled that C code should not matter whether it
    was produced by GCC or MSC. Otherwise yes, the name does not
    matter indeed.

             Werner

    On 28.06.2017 15:00, Francesc Alted wrote:

    Hi Werner,

    Right, what I was missing was basically moving the blosc.dll
    library into the HDF5 plugin directory. I thought that putting
    blosc.dll in a directory in the %PATH% was going to be enough,
    but apparently this is not the case (I suppose this is a Windows
    trickery).

    For what is worth, the name of the DLL plugin is not that
    important as I have tried with libHDF5blosc.dll, libH5Zblosc.dll,
    H5Zblosc.dll and even blosc_plugin.dll and all of them work.
    Apparently the HDF5 library tries all the DLLs in the plugin
    directory and uses the one that registers the necessary filter
    ID; pretty smart.

    Thanks so much!

    2017-06-28 14:31 GMT+02:00 Werner Benger <werner@cct.lsu.edu
    <mailto:werner@cct.lsu.edu>>:

        Just to add:

         under windows, the plugins need to start with lib as prefix.
        It's technically not required, but the HDF5 plugin loader
        expects that. So the liblz4.dll in my plugins dir is the LZ4
        plugin,the libHDF5blosc.dll the blosc-filter; the blosc.dll
        is used by the blosc filter and needs to be in the same
        directory if compiled as dynamic library as well.

                Werner

        On 28.06.2017 14:24, Werner Benger wrote:

        Hi,

         I am using HDF5 with blosc dynamic plugin loading regularly
        under Windows, and this are the files as needed in the
        plugin directory that HDF5 looks for:

        HDF5Plugins $ ll
        total 1.2M
        -rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
        -rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
        -rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

        The blosc.dll is the blosc library, libHDF5blosc.dll is the
        HDF5 plugin using that library.

        I'm using Mingw64, which is gcc 6.3 under MSYS2 .

                  Werner

        On 28.06.2017 13:44, Francesc Alted wrote:

        Hi,

        I have been trying to give support to HDF5 on Windows for
        dynamically loading the Blosc plugin
        (https://github.com/Blosc/hdf5-blosc
        <https://github.com/Blosc/hdf5-blosc>), but no success so far.

        I basically have compiled the plugin with:

        > cl /I"C:\Program Files (x86)\blosc\include"
        /I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c
        blosc_filter.c /OUT:libH5Zblosc.dll /LD /link
        /LIBPATH:"C:\Program Files (x86)\blosc\lib"
        /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

        and then copied the libH5Zblosc.dll
        to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when I try to
        use a h5dump for getting the data of an HDF5 with some
        datasets compressed with Blosc, I am getting:

        >h5dump \tmp\carray1-blosc.h5
        HDF5 "\tmp\carray1-blosc.h5" {
        GROUP "/" {
           DATASET "carray" {
        DATATYPE H5T_STD_U8LE
        DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
              DATA {h5dump error: unable to print data

              }
           }
        }

        When asking for more errors, I am getting a more
        informative message:

        >h5dump --enable-error-stack \tmp\carray1-blosc.h5
        HDF5 "\tmp\carray1-blosc.h5" {
        GROUP "/" {
         DATASET "carray" {
        DATATYPE H5T_STD_U8LE
        DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
        DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
        #000:
        C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
        line 171 in H5Dread(): can't read data
        major: Dataset
        minor: Read failed
        #001:
        C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
        line 544 in H5D__read(): can't read data
        major: Dataset
        minor: Read failed
        #002:
        C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
        line 2050 in H5D__chunk_read(): unable to read raw data chunk
        major: Low-level I/O
        minor: Read failed
        #003:
        C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
        line 3405 in H5D__chunk_lock(): data pipeline read failed
        major: Data filters
        minor: Filter operation failed
        #004:
        C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
        line 1349 in H5Z_pipeline(): required filter 'blosc' is not
        registered
        major: Data filters
        minor: Read failed
        #005:
        C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
        line 389 in H5PL_load(): search in paths failed
        major: Plugin for dynamically loaded library
        minor: Can't get value
        #006:
        C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
        line 812 in H5PL__find(): can't open directory
        major: Plugin for dynamically loaded library
        minor: Can't open directory or file
        h5dump error: unable to print data

        }
           }
        }
        H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
        #000:
        C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
        line 1639 in h5tools_dump_simple_dset(): H5Dread failed
        major: Failure in tools library
        minor: error in function

        I suppose the meaningful part is here:

        10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find():
        can't open directory

        b
        ut I have no clues on 1) what directory the dynamic plugin
        machinery in HDF5 is looking at and 2) which name the DLL
        should have (as per manual, I am using libH5Zblosc.dll, but
        I have tried with H5Zblosc.dll and blosc.dll with no success).

        I have also tried to use the HDF5_PLUGIN_PATH environment
        variable, so as to direct the plugin machinery in HDF5 to
        look into the specific
        %ALLUSERSPROFILE%/hdf5/lib/plugin
         place,
        but no luck.

        I tried with HDF5 1.8.12 and 1.10.1, with same results.
        Finally, if it is of any help, I am using Windows 10 64 bit.

        As a suggestion, it may help to debug situations like this
        if the HDF5 backtrace of the plugin machinery would provide
        info about 1) which directory it is looking at for finding
        the HDF5 plugin and 2) the name of the DLL that it is
        trying to load.

        Thanks in advance,

        -- Francesc Alted

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter:https://twitter.com/hdf5

        -- ___________________________________________________________________________
        Dr. Werner Benger Visualization Research
        Center for Computation & Technology at Louisiana State University (CCT/LSU)
        2019 Digital Media Center, Baton Rouge, Louisiana 70803
        Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter:https://twitter.com/hdf5

        -- ___________________________________________________________________________
        Dr. Werner Benger Visualization Research
        Center for Computation & Technology at Louisiana State University (CCT/LSU)
        2019 Digital Media Center, Baton Rouge, Louisiana 70803
        Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter: https://twitter.com/hdf5

    -- Francesc Alted

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter:https://twitter.com/hdf5

    -- ___________________________________________________________________________
    Dr. Werner Benger Visualization Research
    Center for Computation & Technology at Louisiana State University (CCT/LSU)
    2019 Digital Media Center, Baton Rouge, Louisiana 70803
    Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

faltet · July 4, 2017, 12:35pm

Hi,

Today I spent some more time on this issue, and I recompiled everything
(the Blosc library and its plugin) against HDF5 1.10.1 (the binaries from
hdfgroup.org) in 64 bit mode. Again, I can read Blosc-compressed HDF5
files with h5ls and h5dump (so I am pretty sure that the plugin is
correctly compiled), but h5repack is still failing:

"""
C:\tmp

λ h5repack -v -f UD=32001,8,0,0,0,0,0,9,1,2 carray1.h5 carray1-repack.h5

Objects to modify layout are...

Objects to apply filter are...

User Defined 32001

Making file <carray1-repack.h5>...

···

-----------------------------------------

Type Filter (Compression) Name

-----------------------------------------

group /

HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:

#000:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c line
1037 in H5Pget_filter_by_id2(): can't
find object for ID

major: Object atom

minor: Unable to find atom information (already closed?)

#001:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line
3815 in H5P_object_verify(): property
list is not a member of the class

major: Property lists

minor: Unable to register new atom

#002:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line
3765 in H5P_isa_class(): not a propert
y list

major: Invalid arguments to routine

minor: Inappropriate type

warning: could not create dataset </carray>. Applying original settings

dset /carray

<warning: could not apply the filter to /carray>

"""

At this point, I don't know what to do. I am using VS2017 Community
Edition; could it be possible that I need VS2015 for compiling the plugin?

Also, I have tried to use MingW64 to compile the plugin, but cmake has
difficulties in finding the HDF5 installation:

"""

faltet@FRANCESCALT476E MINGW64 /c/Users/faltet/hdf5-blosc/build

$ HDF5_ROOT="/c/Program Files/HDF_Group/HDF5/1.10.1" cmake ..

System is unknown to cmake, create:

Platform/MINGW64_NT-10.0 to use this system, please send your config file
to cma ke@www.cmake.org so it can be added to cmake

Your CMakeCache.txt file was copied to CopyOfCMakeCache.txt. Please send
that fi le to cmake@www.cmake.org.

BLOSC_PREFIX='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_INSTALL_DIR='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_CMAKE_ARGS='-DCMAKE_INSTALL_PREFIX=/c/Users/faltet/hdf5-blosc/build/blosc'

GIT_EXECUTABLE='/usr/bin/git.exe'

CMake Error at
/usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmak
e:148 (message):

Could NOT find HDF5 (missing: HDF5_LIBRARIES HDF5_HL_LIBRARIES) (found

version "1.10.1")

Call Stack (most recent call first):

/usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmake:388
(_FPHSA _FAILURE_MESSAGE)

/usr/share/cmake-3.6.2/Modules/FindHDF5.cmake:820
(find_package_handle_standar d_args)

CMakeLists.txt:48 (find_package)

-- Configuring incomplete, errors occurred!

See also "/c/Users/faltet/hdf5-blosc/build/CMakeFiles/CMakeOutput.log".
"""

Thanks!

2017-06-28 22:25 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Francesc, I am getting this message, which is correct since I don't have
it compiled with zstd.

h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 myRGBA.f5 myRGBA-out.f5
HDF5-DIAG: Error detected in HDF5 (1.8.17) thread 10592:
  #000: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5D.c line 426 in H5Dclose(): can't decrement count on dataset ID
    major: Dataset
    minor: Unable to decrement reference count
  #001: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c line 1549 in H5I_dec_app_ref_always_close(): can't decrement ID ref count
    major: Object atom
    minor: Unable to decrement reference count
  #002: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c line 1491 in H5I_dec_app_ref(): can't decrement ID ref count
    major: Object atom
    minor: Unable to decrement reference count
  #003: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 1544 in H5D_close(): unable to destroy chunk cache
    major: Dataset
    minor: Unable to release object
  #004: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 5164 in H5D__chunk_dest(): unable to flush one or more raw data chunks
    major: Low-level I/O
    minor: Unable to flush data from cache
  #005: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2641 in H5D__chunk_cache_evict(): cannot flush indexed storage buffer
    major: Low-level I/O
    minor: Write failed
  #006: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2528 in H5D__chunk_flush_entry(): output pipeline failed
    major: Data filters
    minor: Filter operation failed
  #007: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c line 1412 in H5Z_pipeline(): filter returned failure
    major: Data filters
    minor: Write failed
  #008: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c line 190 in blosc_filter(): this Blosc library does not have support for the 'zstd' compressor, but only for: blosclz,lz4,lz4hc,zlib
    major: Data filters
    minor: Callback failed
  #009: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 1507 in H5D_close(): unable to flush cached dataset info
    major: Dataset
    minor: Write failed
  #010: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 2438 in H5D__flush_real(): unable to flush raw data
    major: Dataset
    minor: Unable to flush data from cache
  #011: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2112 in H5D__chunk_flush(): unable to flush one or more raw data chunks
    major: Dataset
    minor: Unable to flush data from cache
  #012: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2528 in H5D__chunk_flush_entry(): output pipeline failed
    major: Data filters
    minor: Filter operation failed
  #013: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c line 1412 in H5Z_pipeline(): filter returned failure
    major: Data filters
    minor: Write failed
  #014: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c line 190 in blosc_filter(): this Blosc library does not have support for the 'zstd' compressor, but only for: blosclz,lz4,lz4hc,zlib
    major: Data filters
    minor: Callback failed
h5repack error: <myRGBA.f5>: Could not copy data to: myRGBA-out.f5

But when using LZ4HC as filter it works fine:

Wrk $ h5repack -f UD=32001,8,0,0,0,0,0,9,1,2 myRGBA.f5 myRGBA-out.f5

Wrk $ ll

-rw-r--r-- 1 Wrk None 12M Jan 25 16:43 myRGBA.f5

-rw-r--r-- 1 Wrk None 5.0M Jun 28 22:18 myRGBA-out.f5

I'm using 1.8.17, evidently.

Btw, the restriction with the lib-prefix has the advantage that the HDF5
plugin loader does not look at DLL's such as "blosc.dll", it would not even
try to load it as a plugin. Just something better than "lib" would probably
be preferable, and independent of platform and compiler. I guess in your
version it even tries to load the blosc.dll itself as a plugin - which
could lead to issues if such a plugin would contain some startup code like
global c++ constructors or code in DllMain which does "something". That's
unlikely to be related to your problem though, I don't see from the output
what the problem could be, it works for me.

          Werner

On 28.06.2017 19:01, Francesc Alted wrote:

Werner, I think the lib- prefix does not apply to my case because I am
using VS2015 for compiling the libraries. But agreed that HDF5 taking
different conventions depending on whether a MSVC or GCC-based is a bit
confusing.

BTW, although the h5dump can read blosc files with the plugin, ptrepack
cannot create them on Windows:

C:\Users\faltet>h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5
carray1-repack.h5
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
h5repack error: <carray1-blosc.h5>: Could not copy data to:
carray1-repack.h5

I have tested with both 1.10.1 and 1.8.19 (above).

whereas it works perfectly well on a Mac box:

Francescs-MacBook-Pro:PyTables faltet$ h5repack -f
UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
Francescs-MacBook-Pro:PyTables faltet$ h5ls -v carray1-repack.h5
Opened "carray1-repack.h5" with sec2 driver.
carray Dataset {200/218, 300/300}
    Location: 1:800
    Links: 1
    Chunks: {218, 300} 65400 bytes
    Storage: 60000 logical bytes, 58 allocated bytes, 103448.28%
utilization
    Filter-0: blosc-32001 {2, 2, 1, 65400, 9, 1, 5, 5}
    Type: native unsigned char

Any hints?

2017-06-28 15:15 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Hi Francesc,

it took me a while to figure out this detail, too, I had the blosc.dll
in the PATH at first, and it seems to work under some circumstances but not
others... not entirely clear to me when it needs to be in the PATH or in
the calling's DLL's directory outside of the PATH.

There's some code in H5PL.c that checks for a lib prefix:

#ifndef __CYGWIN__
        if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
                (HDstrstr(dp->d_name, ".so") || HDstrstr(dp->d_name,
".dylib"))) {
#else
...

#endif

So I guess in your case that prefix check did not apply, whereas for me
using gcc under windows it did. Thus it seems best for compatibility to
keep the plugins named with lib- starting under Windows, once compiled that
C code should not matter whether it was produced by GCC or MSC. Otherwise
yes, the name does not matter indeed.

         Werner

On 28.06.2017 15:00, Francesc Alted wrote:

Hi Werner,

Right, what I was missing was basically moving the blosc.dll library into
the HDF5 plugin directory. I thought that putting blosc.dll in a directory
in the %PATH% was going to be enough, but apparently this is not the case
(I suppose this is a Windows trickery).

For what is worth, the name of the DLL plugin is not that important as I
have tried with libHDF5blosc.dll, libH5Zblosc.dll, H5Zblosc.dll and even
blosc_plugin.dll and all of them work. Apparently the HDF5 library tries
all the DLLs in the plugin directory and uses the one that registers the
necessary filter ID; pretty smart.

Thanks so much!

2017-06-28 14:31 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Just to add:

under windows, the plugins need to start with lib as prefix. It's
technically not required, but the HDF5 plugin loader expects that. So the
liblz4.dll in my plugins dir is the LZ4 plugin,the libHDF5blosc.dll the
blosc-filter; the blosc.dll is used by the blosc filter and needs to be in
the same directory if compiled as dynamic library as well.

        Werner

On 28.06.2017 14:24, Werner Benger wrote:

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under
Windows, and this are the files as needed in the plugin directory that
HDF5 looks for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin
using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

          Werner

On 28.06.2017 13:44, Francesc Alted wrote:

Hi,

I have been trying to give support to HDF5 on Windows for dynamically
loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no
success so far.

I basically have compiled the plugin with:

> cl /I"C:\Program Files (x86)\blosc\include"
/I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c
/OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib"
/LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin",
but when I try to use a h5dump for getting the data of an HDF5 with some
datasets compressed with Blosc, I am getting:

>h5dump \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

      }
   }
}
}

When asking for more errors, I am getting a more informative message:

>h5dump --enable-error-stack \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
line 2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
line 3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open
directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in
HDF5 is looking at and 2) which name the DLL should have (as per manual, I
am using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll
with no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so
as to direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if
it is of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5
backtrace of the plugin machinery would provide info about 1) which
directory it is looking at for finding the HDF5 plugin and 2) the name of
the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <(225)%20578-4809> Fax.: +1 225 578-5362 <(225)%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

werner · July 4, 2017, 1:50pm

Hi,

I have not tried HDF 1.10.1 yet with Mingw, but wanted to give it a try in the next days anyway and can let you know how it goes. I'm not using cmake, but my own makefiles, I think you have access to it anyway, so for now with the 1.8.17 version. I can let you know once I got to check with 1.10.1 .

Werner

···

On 04.07.2017 14:35, Francesc Alted wrote:

Hi,

Today I spent some more time on this issue, and I recompiled everything (the Blosc library and its plugin) against HDF5 1.10.1 (the binaries from hdfgroup.org <http://hdfgroup.org>) in 64 bit mode. Again, I can read Blosc-compressed HDF5 files with h5ls and h5dump (so I am pretty sure that the plugin is correctly compiled), but h5repack is still failing:

"""
C:\tmp
λ h5repack -v -f UD=32001,8,0,0,0,0,0,9,1,2 carray1.h5 carray1-repack.h5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <carray1-repack.h5>...
-----------------------------------------
Type Filter (Compression) Name
-----------------------------------------
group /
HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c line 1037 in H5Pget_filter_by_id2(): can't
find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3815 in H5P_object_verify(): property
list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3765 in H5P_isa_class(): not a propert
y list
    major: Invalid arguments to routine
    minor: Inappropriate type
warning: could not create dataset </carray>. Applying original settings
dset /carray
<warning: could not apply the filter to /carray>
"""

At this point, I don't know what to do. I am using VS2017 Community Edition; could it be possible that I need VS2015 for compiling the plugin?

Also, I have tried to use MingW64 to compile the plugin, but cmake has difficulties in finding the HDF5 installation:

"""

faltet@FRANCESCALT476E MINGW64/c/Users/faltet/hdf5-blosc/build

$ HDF5_ROOT="/c/Program Files/HDF_Group/HDF5/1.10.1" cmake ..

System is unknown to cmake, create:

Platform/MINGW64_NT-10.0 to use this system, please send your config file to cma ke@www.cmake.org <mailto:ke@www.cmake.org> so it can be added to cmake

Your CMakeCache.txt file was copied to CopyOfCMakeCache.txt. Please send that fi le to cmake@www.cmake.org <mailto:cmake@www.cmake.org>.

BLOSC_PREFIX='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_INSTALL_DIR='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_CMAKE_ARGS='-DCMAKE_INSTALL_PREFIX=/c/Users/faltet/hdf5-blosc/build/blosc'

GIT_EXECUTABLE='/usr/bin/git.exe'

CMake Error at /usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmak e:148 (message):

  Could NOT find HDF5 (missing: HDF5_LIBRARIES HDF5_HL_LIBRARIES) (found

  version "1.10.1")

Call Stack (most recent call first):

/usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA _FAILURE_MESSAGE)

/usr/share/cmake-3.6.2/Modules/FindHDF5.cmake:820 (find_package_handle_standar d_args)

  CMakeLists.txt:48 (find_package)

-- Configuring incomplete, errors occurred!

See also "/c/Users/faltet/hdf5-blosc/build/CMakeFiles/CMakeOutput.log".

"""
Thanks!

2017-06-28 22:25 GMT+02:00 Werner Benger <werner@cct.lsu.edu <mailto:werner@cct.lsu.edu>>:

    Francesc, I am getting this message, which is correct since I
    don't have it compiled with zstd.

     h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 myRGBA.f5 myRGBA-out.f5
    HDF5-DIAG: Error detected in HDF5 (1.8.17) thread 10592: #000:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5D.c
    line 426 in H5Dclose(): can't decrement count on dataset ID major: Dataset minor: Unable to decrement reference count #001:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c
    line 1549 in H5I_dec_app_ref_always_close(): can't decrement ID
    ref count major: Object atom minor: Unable to decrement
    reference count #002:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c
    line 1491 in H5I_dec_app_ref(): can't decrement ID ref count major: Object atom minor: Unable to decrement reference count
      #003:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
    line 1544 in H5D_close(): unable to destroy chunk cache major:
    Dataset minor: Unable to release object #004:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 5164 in H5D__chunk_dest(): unable to flush one or more raw
    data chunks major: Low-level I/O minor: Unable to flush
    data from cache #005:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 2641 in H5D__chunk_cache_evict(): cannot flush indexed
    storage buffer major: Low-level I/O minor: Write failed #006:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 2528 in H5D__chunk_flush_entry(): output pipeline failed major: Data filters minor: Filter operation failed #007:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c
    line 1412 in H5Z_pipeline(): filter returned failure major:
    Data filters minor: Write failed #008:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c
    line 190 in blosc_filter(): this Blosc library does not have
    support for the 'zstd' compressor, but only for:
    blosclz,lz4,lz4hc,zlib major: Data filters minor: Callback
    failed #009:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
    line 1507 in H5D_close(): unable to flush cached dataset info major: Dataset minor: Write failed #010:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
    line 2438 in H5D__flush_real(): unable to flush raw data major: Dataset minor: Unable to flush data from cache #011:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 2112 in H5D__chunk_flush(): unable to flush one or more raw
    data chunks major: Dataset minor: Unable to flush data
    from cache #012:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 2528 in H5D__chunk_flush_entry(): output pipeline failed major: Data filters minor: Filter operation failed #013:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c
    line 1412 in H5Z_pipeline(): filter returned failure major:
    Data filters minor: Write failed #014:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c
    line 190 in blosc_filter(): this Blosc library does not have
    support for the 'zstd' compressor, but only for:
    blosclz,lz4,lz4hc,zlib major: Data filters minor: Callback
    failed h5repack error: <myRGBA.f5>: Could not copy data to:
    myRGBA-out.f5

    But when using LZ4HC as filter it works fine:

    Wrk $ h5repack -f UD=32001,8,0,0,0,0,0,9,1,2 myRGBA.f5 myRGBA-out.f5

    Wrk $ ll

    -rw-r--r-- 1 Wrk None 12M Jan 25 16:43 myRGBA.f5

    -rw-r--r-- 1 Wrk None 5.0M Jun 28 22:18 myRGBA-out.f5

    I'm using 1.8.17, evidently.

    Btw, the restriction with the lib-prefix has the advantage that
    the HDF5 plugin loader does not look at DLL's such as "blosc.dll",
    it would not even try to load it as a plugin. Just something
    better than "lib" would probably be preferable, and independent of
    platform and compiler. I guess in your version it even tries to
    load the blosc.dll itself as a plugin - which could lead to issues
    if such a plugin would contain some startup code like global c++
    constructors or code in DllMain which does "something". That's
    unlikely to be related to your problem though, I don't see from
    the output what the problem could be, it works for me.

              Werner

    On 28.06.2017 19:01, Francesc Alted wrote:

    Werner, I think the lib- prefix does not apply to my case because
    I am using VS2015 for compiling the libraries. But agreed that
    HDF5 taking different conventions depending on whether a MSVC or
    GCC-based is a bit confusing.

    BTW, although the h5dump can read blosc files with the plugin,
    ptrepack cannot create them on Windows:

    C:\Users\faltet>h5repack -f UD=32001,8,0,0,0,0,0,9,1,5
    carray1-blosc.h5 carray1-repack.h5
    HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
      #000:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
    line 1100 in H5Pget_filter_by_id2(): can't find object for ID
        major: Object atom
        minor: Unable to find atom information (already closed?)
      #001:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
    line 3379 in H5P_object_verify(): property list is not a member
    of the class
        major: Property lists
        minor: Unable to register new atom
      #002:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
    line 3329 in H5P_isa_class(): not a property list
        major: Invalid arguments to routine
        minor: Inappropriate type
    HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
      #000:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
    line 1100 in H5Pget_filter_by_id2(): can't find object for ID
        major: Object atom
        minor: Unable to find atom information (already closed?)
      #001:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
    line 3379 in H5P_object_verify(): property list is not a member
    of the class
        major: Property lists
        minor: Unable to register new atom
      #002:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
    line 3329 in H5P_isa_class(): not a property list
        major: Invalid arguments to routine
        minor: Inappropriate type
    h5repack error: <carray1-blosc.h5>: Could not copy data to:
    carray1-repack.h5

    I have tested with both 1.10.1 and 1.8.19 (above).

    whereas it works perfectly well on a Mac box:

    Francescs-MacBook-Pro:PyTables faltet$ h5repack -f
    UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
    Francescs-MacBook-Pro:PyTables faltet$ h5ls -v carray1-repack.h5
    Opened "carray1-repack.h5" with sec2 driver.
    carray Dataset {200/218, 300/300}
        Location: 1:800
        Links: 1
        Chunks: {218, 300} 65400 bytes
        Storage: 60000 logical bytes, 58 allocated bytes,
    103448.28% utilization
        Filter-0: blosc-32001 {2, 2, 1, 65400, 9, 1, 5, 5}
        Type: native unsigned char

    Any hints?

    2017-06-28 15:15 GMT+02:00 Werner Benger <werner@cct.lsu.edu
    <mailto:werner@cct.lsu.edu>>:

        Hi Francesc,

         it took me a while to figure out this detail, too, I had the
        blosc.dll in the PATH at first, and it seems to work under
        some circumstances but not others... not entirely clear to me
        when it needs to be in the PATH or in the calling's DLL's
        directory outside of the PATH.

        There's some code in H5PL.c that checks for a lib prefix:

        #ifndef __CYGWIN__
                if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
                        (HDstrstr(dp->d_name, ".so") ||
        HDstrstr(dp->d_name, ".dylib"))) {
        #else
        ...

        #endif

        So I guess in your case that prefix check did not apply,
        whereas for me using gcc under windows it did. Thus it seems
        best for compatibility to keep the plugins named with lib-
        starting under Windows, once compiled that C code should not
        matter whether it was produced by GCC or MSC. Otherwise yes,
        the name does not matter indeed.

                 Werner

        On 28.06.2017 15:00, Francesc Alted wrote:

        Hi Werner,

        Right, what I was missing was basically moving the blosc.dll
        library into the HDF5 plugin directory. I thought that
        putting blosc.dll in a directory in the %PATH% was going to
        be enough, but apparently this is not the case (I suppose
        this is a Windows trickery).

        For what is worth, the name of the DLL plugin is not that
        important as I have tried with libHDF5blosc.dll,
        libH5Zblosc.dll, H5Zblosc.dll and even blosc_plugin.dll and
        all of them work. Apparently the HDF5 library tries all the
        DLLs in the plugin directory and uses the one that registers
        the necessary filter ID; pretty smart.

        Thanks so much!

        2017-06-28 14:31 GMT+02:00 Werner Benger <werner@cct.lsu.edu
        <mailto:werner@cct.lsu.edu>>:

            Just to add:

             under windows, the plugins need to start with lib as
            prefix. It's technically not required, but the HDF5
            plugin loader expects that. So the liblz4.dll in my
            plugins dir is the LZ4 plugin,the libHDF5blosc.dll the
            blosc-filter; the blosc.dll is used by the blosc filter
            and needs to be in the same directory if compiled as
            dynamic library as well.

                    Werner

            On 28.06.2017 14:24, Werner Benger wrote:

            Hi,

             I am using HDF5 with blosc dynamic plugin loading
            regularly under Windows, and this are the files as
            needed in the plugin directory that HDF5 looks for:

            HDF5Plugins $ ll
            total 1.2M
            -rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
            -rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
            -rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

            The blosc.dll is the blosc library, libHDF5blosc.dll is
            the HDF5 plugin using that library.

            I'm using Mingw64, which is gcc 6.3 under MSYS2 .

                      Werner

            On 28.06.2017 13:44, Francesc Alted wrote:

            Hi,

            I have been trying to give support to HDF5 on Windows
            for dynamically loading the Blosc plugin
            (https://github.com/Blosc/hdf5-blosc
            <https://github.com/Blosc/hdf5-blosc>), but no success
            so far.

            I basically have compiled the plugin with:

            > cl /I"C:\Program Files (x86)\blosc\include"
            /I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c
            blosc_filter.c /OUT:libH5Zblosc.dll /LD /link
            /LIBPATH:"C:\Program Files (x86)\blosc\lib"
            /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

            and then copied the libH5Zblosc.dll
            to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when I try
            to use a h5dump for getting the data of an HDF5 with
            some datasets compressed with Blosc, I am getting:

            >h5dump \tmp\carray1-blosc.h5
            HDF5 "\tmp\carray1-blosc.h5" {
            GROUP "/" {
             DATASET "carray" {
            DATATYPE H5T_STD_U8LE
            DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
            DATA {h5dump error: unable to print data

            }
               }
            }

            When asking for more errors, I am getting a more
            informative message:

            >h5dump --enable-error-stack \tmp\carray1-blosc.h5
            HDF5 "\tmp\carray1-blosc.h5" {
            GROUP "/" {
             DATASET "carray" {
                DATATYPE H5T_STD_U8LE
                DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
                DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1)
            thread 0:
            #000:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
            line 171 in H5Dread(): can't read data
              major: Dataset
              minor: Read failed
            #001:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
            line 544 in H5D__read(): can't read data
              major: Dataset
              minor: Read failed
            #002:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
            line 2050 in H5D__chunk_read(): unable to read raw
            data chunk
              major: Low-level I/O
              minor: Read failed
            #003:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
            line 3405 in H5D__chunk_lock(): data pipeline read failed
              major: Data filters
              minor: Filter operation failed
            #004:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
            line 1349 in H5Z_pipeline(): required filter 'blosc'
            is not registered
              major: Data filters
              minor: Read failed
            #005:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
            line 389 in H5PL_load(): search in paths failed
              major: Plugin for dynamically loaded library
              minor: Can't get value
            #006:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
            line 812 in H5PL__find(): can't open directory
              major: Plugin for dynamically loaded library
              minor: Can't open directory or file
            h5dump error: unable to print data

                }
             }
            }
            H5tools-DIAG: Error detected in HDF5:tools (1.10.1)
            thread 0:
            #000:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
            line 1639 in h5tools_dump_simple_dset(): H5Dread failed
              major: Failure in tools library
              minor: error in function

            I suppose the meaningful part is here:

            10vs14\build\hdfsrc\src\H5PL.c line 812 in
            H5PL__find(): can't open directory

            b
            ut I have no clues on 1) what directory the dynamic
            plugin machinery in HDF5 is looking at and 2) which
            name the DLL should have (as per manual, I am using
            libH5Zblosc.dll, but I have tried with H5Zblosc.dll
            and blosc.dll with no success).

            I have also tried to use the HDF5_PLUGIN_PATH
            environment variable, so as to direct the plugin
            machinery in HDF5 to look into the specific
            %ALLUSERSPROFILE%/hdf5/lib/plugin
             place,
            but no luck.

            I tried with HDF5 1.8.12 and 1.10.1, with same
            results. Finally, if it is of any help, I am using
            Windows 10 64 bit.

            As a suggestion, it may help to debug situations like
            this if the HDF5 backtrace of the plugin machinery
            would provide info about 1) which directory it is
            looking at for finding the HDF5 plugin and 2) the name
            of the DLL that it is trying to load.

            Thanks in advance,

            -- Francesc Alted

            _______________________________________________
            Hdf-forum is for HDF software users discussion.
            Hdf-forum@lists.hdfgroup.org
            <mailto:Hdf-forum@lists.hdfgroup.org>
            http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
            <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
            Twitter:https://twitter.com/hdf5

            -- ___________________________________________________________________________
            Dr. Werner Benger Visualization Research
            Center for Computation & Technology at Louisiana State University (CCT/LSU)
            2019 Digital Media Center, Baton Rouge, Louisiana 70803
            Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

            _______________________________________________
            Hdf-forum is for HDF software users discussion.
            Hdf-forum@lists.hdfgroup.org
            <mailto:Hdf-forum@lists.hdfgroup.org>
            http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
            <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
            Twitter:https://twitter.com/hdf5

            -- ___________________________________________________________________________
            Dr. Werner Benger Visualization Research
            Center for Computation & Technology at Louisiana State University (CCT/LSU)
            2019 Digital Media Center, Baton Rouge, Louisiana 70803
            Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

            _______________________________________________
            Hdf-forum is for HDF software users discussion.
            Hdf-forum@lists.hdfgroup.org
            <mailto:Hdf-forum@lists.hdfgroup.org>
            http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
            <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
            Twitter: https://twitter.com/hdf5

        -- Francesc Alted

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter:https://twitter.com/hdf5

        -- ___________________________________________________________________________
        Dr. Werner Benger Visualization Research
        Center for Computation & Technology at Louisiana State University (CCT/LSU)
        2019 Digital Media Center, Baton Rouge, Louisiana 70803
        Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter: https://twitter.com/hdf5

    -- Francesc Alted

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter:https://twitter.com/hdf5

    -- ___________________________________________________________________________
    Dr. Werner Benger Visualization Research
    Center for Computation & Technology at Louisiana State University (CCT/LSU)
    2019 Digital Media Center, Baton Rouge, Louisiana 70803
    Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

werner · July 7, 2017, 2:18pm

Hi Francesc,

I got it to run with 1.10.1 and GCC 7.1 under MSYS2, kind of, but the 8-parameter makes it to hang forever, it only works with giving 7 parameters on h5repack for me:

/bin/arch-x86_64-w64-mingw32-OptDeb/h5repack -v -f UD=32001,7,0,0,0,0,4,2,1 myRGBA.f5 myRGBA-repack.f5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <myRGBA-repack.f5>...

···

-----------------------------------------
Type Filter (Compression) Name
...

dset UD (1.582:1) /t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/Height/Fragment[0x0x0]

...

The file looks all fine:

./bin/arch-x86_64-w64-mingw32-OptDeb/h5ls.exe -rv myRGBA-repack.f5/t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/ReturnNumber/Fragment[0x0x0]
Opened "myRGBA-repack.f5" with sec2 driver.
t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/ReturnNumber/Fragment[0x0x0] Dataset {1/1, 256/256, 256/256}
Data: Contiguous
Location: 1:4283257
Links: 1
Chunks: {1, 256, 256} 65536 bytes
Storage: 65536 logical bytes, 21807 allocated bytes, 300.53% utilization
Filter-0: blosc-32001 {2, 2, 1, 65536, 4, 2, 1}
Type: native unsigned char

whereas the setting with 8 parameters hangs forever:

./bin/arch-x86_64-w64-mingw32-OptDeb/h5repack -v -f UD=32001,8,0,0,0,0,0,4,2,1 myRGBA.f5 myRGBA-repack.f5

If you want to try my configuration, try this in MSYS2:

svn co https://subversion.assembla.com/svn/FiberHDF5/hdf5; cd hdf5; mingw32-make -j12

Maybe I am using an older version of blosc that doesn't like 8 parameters?

Werner

On 04.07.2017 15:50, Werner Benger wrote:

Hi,

I have not tried HDF 1.10.1 yet with Mingw, but wanted to give it a try in the next days anyway and can let you know how it goes. I'm not using cmake, but my own makefiles, I think you have access to it anyway, so for now with the 1.8.17 version. I can let you know once I got to check with 1.10.1 .

        Werner

On 04.07.2017 14:35, Francesc Alted wrote:

Hi,

Today I spent some more time on this issue, and I recompiled everything (the Blosc library and its plugin) against HDF5 1.10.1 (the binaries from hdfgroup.org <http://hdfgroup.org>) in 64 bit mode. Again, I can read Blosc-compressed HDF5 files with h5ls and h5dump (so I am pretty sure that the plugin is correctly compiled), but h5repack is still failing:

"""
C:\tmp
λ h5repack -v -f UD=32001,8,0,0,0,0,0,9,1,2 carray1.h5 carray1-repack.h5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <carray1-repack.h5>...
-----------------------------------------
Type Filter (Compression) Name
-----------------------------------------
group /
HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c line 1037 in H5Pget_filter_by_id2(): can't
find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3815 in H5P_object_verify(): property
list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3765 in H5P_isa_class(): not a propert
y list
    major: Invalid arguments to routine
    minor: Inappropriate type
warning: could not create dataset </carray>. Applying original settings
dset /carray
<warning: could not apply the filter to /carray>
"""

At this point, I don't know what to do. I am using VS2017 Community Edition; could it be possible that I need VS2015 for compiling the plugin?

Also, I have tried to use MingW64 to compile the plugin, but cmake has difficulties in finding the HDF5 installation:

"""

faltet@FRANCESCALT476E MINGW64/c/Users/faltet/hdf5-blosc/build

$ HDF5_ROOT="/c/Program Files/HDF_Group/HDF5/1.10.1" cmake ..

System is unknown to cmake, create:

Platform/MINGW64_NT-10.0 to use this system, please send your config file to cma ke@www.cmake.org <mailto:ke@www.cmake.org> so it can be added to cmake

Your CMakeCache.txt file was copied to CopyOfCMakeCache.txt. Please send that fi le to cmake@www.cmake.org <mailto:cmake@www.cmake.org>.

BLOSC_PREFIX='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_INSTALL_DIR='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_CMAKE_ARGS='-DCMAKE_INSTALL_PREFIX=/c/Users/faltet/hdf5-blosc/build/blosc'

GIT_EXECUTABLE='/usr/bin/git.exe'

CMake Error at /usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmak e:148 (message):

  Could NOT find HDF5 (missing: HDF5_LIBRARIES HDF5_HL_LIBRARIES) (found

  version "1.10.1")

Call Stack (most recent call first):

/usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA _FAILURE_MESSAGE)

/usr/share/cmake-3.6.2/Modules/FindHDF5.cmake:820 (find_package_handle_standar d_args)

  CMakeLists.txt:48 (find_package)

-- Configuring incomplete, errors occurred!

See also "/c/Users/faltet/hdf5-blosc/build/CMakeFiles/CMakeOutput.log".

"""
Thanks!

2017-06-28 22:25 GMT+02:00 Werner Benger <werner@cct.lsu.edu <mailto:werner@cct.lsu.edu>>:

    Francesc, I am getting this message, which is correct since I
    don't have it compiled with zstd.

     h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 myRGBA.f5 myRGBA-out.f5
    HDF5-DIAG: Error detected in HDF5 (1.8.17) thread 10592: #000:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5D.c
    line 426 in H5Dclose(): can't decrement count on dataset ID major: Dataset minor: Unable to decrement reference count #001:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c
    line 1549 in H5I_dec_app_ref_always_close(): can't decrement ID
    ref count major: Object atom minor: Unable to decrement
    reference count #002:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c
    line 1491 in H5I_dec_app_ref(): can't decrement ID ref count major: Object atom minor: Unable to decrement reference count
      #003:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
    line 1544 in H5D_close(): unable to destroy chunk cache major: Dataset minor: Unable to release object #004:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 5164 in H5D__chunk_dest(): unable to flush one or more raw
    data chunks major: Low-level I/O minor: Unable to flush
    data from cache #005:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 2641 in H5D__chunk_cache_evict(): cannot flush indexed
    storage buffer major: Low-level I/O minor: Write failed #006:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 2528 in H5D__chunk_flush_entry(): output pipeline failed major: Data filters minor: Filter operation failed #007:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c
    line 1412 in H5Z_pipeline(): filter returned failure major:
    Data filters minor: Write failed #008:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c
    line 190 in blosc_filter(): this Blosc library does not have
    support for the 'zstd' compressor, but only for:
    blosclz,lz4,lz4hc,zlib major: Data filters minor:
    Callback failed #009:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
    line 1507 in H5D_close(): unable to flush cached dataset info major: Dataset minor: Write failed #010:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
    line 2438 in H5D__flush_real(): unable to flush raw data major: Dataset minor: Unable to flush data from cache #011:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 2112 in H5D__chunk_flush(): unable to flush one or more raw
    data chunks major: Dataset minor: Unable to flush data
    from cache #012:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
    line 2528 in H5D__chunk_flush_entry(): output pipeline failed major: Data filters minor: Filter operation failed #013:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c
    line 1412 in H5Z_pipeline(): filter returned failure major:
    Data filters minor: Write failed #014:
    C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c
    line 190 in blosc_filter(): this Blosc library does not have
    support for the 'zstd' compressor, but only for:
    blosclz,lz4,lz4hc,zlib major: Data filters minor:
    Callback failed h5repack error: <myRGBA.f5>: Could not copy data
    to: myRGBA-out.f5

    But when using LZ4HC as filter it works fine:

    Wrk $ h5repack -f UD=32001,8,0,0,0,0,0,9,1,2 myRGBA.f5 myRGBA-out.f5

    Wrk $ ll

    -rw-r--r-- 1 Wrk None 12M Jan 25 16:43 myRGBA.f5

    -rw-r--r-- 1 Wrk None 5.0M Jun 28 22:18 myRGBA-out.f5

    I'm using 1.8.17, evidently.

    Btw, the restriction with the lib-prefix has the advantage that
    the HDF5 plugin loader does not look at DLL's such as
    "blosc.dll", it would not even try to load it as a plugin. Just
    something better than "lib" would probably be preferable, and
    independent of platform and compiler. I guess in your version it
    even tries to load the blosc.dll itself as a plugin - which could
    lead to issues if such a plugin would contain some startup code
    like global c++ constructors or code in DllMain which does
    "something". That's unlikely to be related to your problem
    though, I don't see from the output what the problem could be, it
    works for me.

              Werner

    On 28.06.2017 19:01, Francesc Alted wrote:

    Werner, I think the lib- prefix does not apply to my case
    because I am using VS2015 for compiling the libraries. But
    agreed that HDF5 taking different conventions depending on
    whether a MSVC or GCC-based is a bit confusing.

    BTW, although the h5dump can read blosc files with the plugin,
    ptrepack cannot create them on Windows:

    C:\Users\faltet>h5repack -f UD=32001,8,0,0,0,0,0,9,1,5
    carray1-blosc.h5 carray1-repack.h5
    HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
      #000:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
    line 1100 in H5Pget_filter_by_id2(): can't find object for ID
        major: Object atom
        minor: Unable to find atom information (already closed?)
      #001:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
    line 3379 in H5P_object_verify(): property list is not a member
    of the class
        major: Property lists
        minor: Unable to register new atom
      #002:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
    line 3329 in H5P_isa_class(): not a property list
        major: Invalid arguments to routine
        minor: Inappropriate type
    HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
      #000:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
    line 1100 in H5Pget_filter_by_id2(): can't find object for ID
        major: Object atom
        minor: Unable to find atom information (already closed?)
      #001:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
    line 3379 in H5P_object_verify(): property list is not a member
    of the class
        major: Property lists
        minor: Unable to register new atom
      #002:
    C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
    line 3329 in H5P_isa_class(): not a property list
        major: Invalid arguments to routine
        minor: Inappropriate type
    h5repack error: <carray1-blosc.h5>: Could not copy data to:
    carray1-repack.h5

    I have tested with both 1.10.1 and 1.8.19 (above).

    whereas it works perfectly well on a Mac box:

    Francescs-MacBook-Pro:PyTables faltet$ h5repack -f
    UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
    Francescs-MacBook-Pro:PyTables faltet$ h5ls -v carray1-repack.h5
    Opened "carray1-repack.h5" with sec2 driver.
    carray Dataset {200/218, 300/300}
        Location: 1:800
        Links: 1
        Chunks: {218, 300} 65400 bytes
        Storage: 60000 logical bytes, 58 allocated bytes,
    103448.28% utilization
        Filter-0: blosc-32001 {2, 2, 1, 65400, 9, 1, 5, 5}
        Type: native unsigned char

    Any hints?

    2017-06-28 15:15 GMT+02:00 Werner Benger <werner@cct.lsu.edu
    <mailto:werner@cct.lsu.edu>>:

        Hi Francesc,

         it took me a while to figure out this detail, too, I had
        the blosc.dll in the PATH at first, and it seems to work
        under some circumstances but not others... not entirely
        clear to me when it needs to be in the PATH or in the
        calling's DLL's directory outside of the PATH.

        There's some code in H5PL.c that checks for a lib prefix:

        #ifndef __CYGWIN__
                if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
                        (HDstrstr(dp->d_name, ".so") ||
        HDstrstr(dp->d_name, ".dylib"))) {
        #else
        ...

        #endif

        So I guess in your case that prefix check did not apply,
        whereas for me using gcc under windows it did. Thus it seems
        best for compatibility to keep the plugins named with lib-
        starting under Windows, once compiled that C code should not
        matter whether it was produced by GCC or MSC. Otherwise yes,
        the name does not matter indeed.

                 Werner

        On 28.06.2017 15:00, Francesc Alted wrote:

        Hi Werner,

        Right, what I was missing was basically moving the
        blosc.dll library into the HDF5 plugin directory. I thought
        that putting blosc.dll in a directory in the %PATH% was
        going to be enough, but apparently this is not the case (I
        suppose this is a Windows trickery).

        For what is worth, the name of the DLL plugin is not that
        important as I have tried with libHDF5blosc.dll,
        libH5Zblosc.dll, H5Zblosc.dll and even blosc_plugin.dll and
        all of them work. Apparently the HDF5 library tries all
        the DLLs in the plugin directory and uses the one that
        registers the necessary filter ID; pretty smart.

        Thanks so much!

        2017-06-28 14:31 GMT+02:00 Werner Benger
        <werner@cct.lsu.edu <mailto:werner@cct.lsu.edu>>:

            Just to add:

             under windows, the plugins need to start with lib as
            prefix. It's technically not required, but the HDF5
            plugin loader expects that. So the liblz4.dll in my
            plugins dir is the LZ4 plugin,the libHDF5blosc.dll the
            blosc-filter; the blosc.dll is used by the blosc filter
            and needs to be in the same directory if compiled as
            dynamic library as well.

                    Werner

            On 28.06.2017 14:24, Werner Benger wrote:

            Hi,

             I am using HDF5 with blosc dynamic plugin loading
            regularly under Windows, and this are the files as
            needed in the plugin directory that HDF5 looks for:

            HDF5Plugins $ ll
            total 1.2M
            -rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
            -rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
            -rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

            The blosc.dll is the blosc library, libHDF5blosc.dll
            is the HDF5 plugin using that library.

            I'm using Mingw64, which is gcc 6.3 under MSYS2 .

                      Werner

            On 28.06.2017 13:44, Francesc Alted wrote:

            Hi,

            I have been trying to give support to HDF5 on Windows
            for dynamically loading the Blosc plugin
            (https://github.com/Blosc/hdf5-blosc
            <https://github.com/Blosc/hdf5-blosc>), but no
            success so far.

            I basically have compiled the plugin with:

            > cl /I"C:\Program Files (x86)\blosc\include"
            /I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c
            blosc_filter.c /OUT:libH5Zblosc.dll /LD /link
            /LIBPATH:"C:\Program Files (x86)\blosc\lib"
            /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib
            hdf5.lib

            and then copied the libH5Zblosc.dll
            to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when I
            try to use a h5dump for getting the data of an HDF5
            with some datasets compressed with Blosc, I am getting:

            >h5dump \tmp\carray1-blosc.h5
            HDF5 "\tmp\carray1-blosc.h5" {
            GROUP "/" {
             DATASET "carray" {
            DATATYPE H5T_STD_U8LE
            DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
            DATA {h5dump error: unable to print data

            }
               }
            }

            When asking for more errors, I am getting a more
            informative message:

            >h5dump --enable-error-stack \tmp\carray1-blosc.h5
            HDF5 "\tmp\carray1-blosc.h5" {
            GROUP "/" {
             DATASET "carray" {
                DATATYPE H5T_STD_U8LE
                DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
                DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1)
            thread 0:
            #000:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
            line 171 in H5Dread(): can't read data
              major: Dataset
              minor: Read failed
            #001:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
            line 544 in H5D__read(): can't read data
              major: Dataset
              minor: Read failed
            #002:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
            line 2050 in H5D__chunk_read(): unable to read raw
            data chunk
              major: Low-level I/O
              minor: Read failed
            #003:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
            line 3405 in H5D__chunk_lock(): data pipeline read failed
              major: Data filters
              minor: Filter operation failed
            #004:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
            line 1349 in H5Z_pipeline(): required filter 'blosc'
            is not registered
              major: Data filters
              minor: Read failed
            #005:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
            line 389 in H5PL_load(): search in paths failed
              major: Plugin for dynamically loaded library
              minor: Can't get value
            #006:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
            line 812 in H5PL__find(): can't open directory
              major: Plugin for dynamically loaded library
              minor: Can't open directory or file
            h5dump error: unable to print data

                }
             }
            }
            H5tools-DIAG: Error detected in HDF5:tools (1.10.1)
            thread 0:
            #000:
            C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
            line 1639 in h5tools_dump_simple_dset(): H5Dread failed
              major: Failure in tools library
              minor: error in function

            I suppose the meaningful part is here:

            10vs14\build\hdfsrc\src\H5PL.c line 812 in
            H5PL__find(): can't open directory

            b
            ut I have no clues on 1) what directory the dynamic
            plugin machinery in HDF5 is looking at and 2) which
            name the DLL should have (as per manual, I am using
            libH5Zblosc.dll, but I have tried with H5Zblosc.dll
            and blosc.dll with no success).

            I have also tried to use the HDF5_PLUGIN_PATH
            environment variable, so as to direct the plugin
            machinery in HDF5 to look into the specific
            %ALLUSERSPROFILE%/hdf5/lib/plugin
             place,
            but no luck.

            I tried with HDF5 1.8.12 and 1.10.1, with same
            results. Finally, if it is of any help, I am using
            Windows 10 64 bit.

            As a suggestion, it may help to debug situations
            like this if the HDF5 backtrace of the plugin
            machinery would provide info about 1) which directory
            it is looking at for finding the HDF5 plugin and 2)
            the name of the DLL that it is trying to load.

            Thanks in advance,

            -- Francesc Alted

            _______________________________________________
            Hdf-forum is for HDF software users discussion.
            Hdf-forum@lists.hdfgroup.org
            <mailto:Hdf-forum@lists.hdfgroup.org>
            http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
            <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
            Twitter:https://twitter.com/hdf5

            -- ___________________________________________________________________________
            Dr. Werner Benger Visualization Research
            Center for Computation & Technology at Louisiana State University (CCT/LSU)
            2019 Digital Media Center, Baton Rouge, Louisiana 70803
            Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

            _______________________________________________
            Hdf-forum is for HDF software users discussion.
            Hdf-forum@lists.hdfgroup.org
            <mailto:Hdf-forum@lists.hdfgroup.org>
            http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
            <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
            Twitter:https://twitter.com/hdf5

            -- ___________________________________________________________________________
            Dr. Werner Benger Visualization Research
            Center for Computation & Technology at Louisiana State University (CCT/LSU)
            2019 Digital Media Center, Baton Rouge, Louisiana 70803
            Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

            _______________________________________________
            Hdf-forum is for HDF software users discussion.
            Hdf-forum@lists.hdfgroup.org
            <mailto:Hdf-forum@lists.hdfgroup.org>
            http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
            <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
            Twitter: https://twitter.com/hdf5

        -- Francesc Alted

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter:https://twitter.com/hdf5

        -- ___________________________________________________________________________
        Dr. Werner Benger Visualization Research
        Center for Computation & Technology at Louisiana State University (CCT/LSU)
        2019 Digital Media Center, Baton Rouge, Louisiana 70803
        Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter: https://twitter.com/hdf5

    -- Francesc Alted

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter:https://twitter.com/hdf5

    -- ___________________________________________________________________________
    Dr. Werner Benger Visualization Research
    Center for Computation & Technology at Louisiana State University (CCT/LSU)
    2019 Digital Media Center, Baton Rouge, Louisiana 70803
    Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter:https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

faltet · July 7, 2017, 3:58pm

Hi Werner,

Yeah, the different in the number of parameters is curious. And no, all
the hdf5-blosc plugin versions take 7 params (4 reserved, hence the 4 0s)
and 3 for the actual compression parameters (complevel, shuffle, codec), so
I don't quite understand why 8 (with 5 0s) works for me, but it is indeed
the required number on Unix boxes (using HDF5 1.8.x there, so maybe the
difference is just because HDF5 1.8.x and 1.10.x).

I have just tried with 7 params on Windows, but I am having the same
problem again:

λ h5repack -v -f UD=32001,7,0,0,0,0,4,2,1 carray1-zlib.h5 carray1-repack.h5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <carray1-repack.h5>...

···

-----------------------------------------
Type Filter (Compression) Name
-----------------------------------------
group /
HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c line
1037 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line
3815 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002:
C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line
3765 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
warning: could not create dataset </carray>. Applying original settings
dset /carray
<warning: could not apply the filter to /carray>

Anyway, for the record, I ended using ptrepack for converting HDF5 files
into Blosc-compressed ones:

λ ptrepack --complib blosc:lz4 --complevel=5 --shuffle 1 carray1-zlib.h5
carray1-repack.h5 -o

λ ptdump carray1-repack.h5

/ (RootGroup) ''

/carray (CArray(200, 300), shuffle, blosc:lz4(5)) ''

Anyways, thanks for all the help,

Francesc

2017-07-07 16:18 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Hi Francesc,

I got it to run with 1.10.1 and GCC 7.1 under MSYS2, kind of, but the
8-parameter makes it to hang forever, it only works with giving 7
parameters on h5repack for me:

/bin/arch-x86_64-w64-mingw32-OptDeb/h5repack -v -f UD=32001,7,0,0,0,0,4,2,1 myRGBA.f5 myRGBA-repack.f5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <myRGBA-repack.f5>...
-----------------------------------------
Type Filter (Compression) Name
...

dset UD (1.582:1) /t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/Height/Fragment[0x0x0]

...

The file looks all fine:

./bin/arch-x86_64-w64-mingw32-OptDeb/h5ls.exe -rv
myRGBA-repack.f5/t=000000000.0000000000/RGBA/Points/
StandardCartesianChart3D/ReturnNumber/Fragment[0x0x0]
Opened "myRGBA-repack.f5" with sec2 driver.
t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/ReturnNumber/Fragment[0x0x0]
Dataset {1/1, 256/256, 256/256}
Data: Contiguous
Location: 1:4283257
Links: 1
Chunks: {1, 256, 256} 65536 bytes
Storage: 65536 logical bytes, 21807 allocated bytes, 300.53% utilization
Filter-0: blosc-32001 {2, 2, 1, 65536, 4, 2, 1}
Type: native unsigned char

whereas the setting with 8 parameters hangs forever:

./bin/arch-x86_64-w64-mingw32-OptDeb/h5repack -v -f
UD=32001,8,0,0,0,0,0,4,2,1 myRGBA.f5 myRGBA-repack.f5

If you want to try my configuration, try this in MSYS2:

svn co https://subversion.assembla.com/svn/FiberHDF5/hdf5; cd hdf5;
mingw32-make -j12

Maybe I am using an older version of blosc that doesn't like 8 parameters?

            Werner

On 04.07.2017 15:50, Werner Benger wrote:

Hi,

I have not tried HDF 1.10.1 yet with Mingw, but wanted to give it a try
in the next days anyway and can let you know how it goes. I'm not using
cmake, but my own makefiles, I think you have access to it anyway, so for
now with the 1.8.17 version. I can let you know once I got to check with
1.10.1 .

        Werner

On 04.07.2017 14:35, Francesc Alted wrote:

Hi,

Today I spent some more time on this issue, and I recompiled everything
(the Blosc library and its plugin) against HDF5 1.10.1 (the binaries from
hdfgroup.org) in 64 bit mode. Again, I can read Blosc-compressed HDF5
files with h5ls and h5dump (so I am pretty sure that the plugin is
correctly compiled), but h5repack is still failing:

"""
C:\tmp

λ h5repack -v -f UD=32001,8,0,0,0,0,0,9,1,2 carray1.h5 carray1-repack.h5

Objects to modify layout are...

Objects to apply filter are...

User Defined 32001

Making file <carray1-repack.h5>...

-----------------------------------------

Type Filter (Compression) Name

-----------------------------------------

group /

HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:

  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c
line 1037 in H5Pget_filter_by_id2(): can't
find object for ID

    major: Object atom

    minor: Unable to find atom information (already closed?)

  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c
line 3815 in H5P_object_verify(): property
list is not a member of the class

    major: Property lists

    minor: Unable to register new atom

  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c
line 3765 in H5P_isa_class(): not a propert
y list

    major: Invalid arguments to routine

    minor: Inappropriate type

warning: could not create dataset </carray>. Applying original settings

dset /carray

<warning: could not apply the filter to /carray>

"""

At this point, I don't know what to do. I am using VS2017 Community
Edition; could it be possible that I need VS2015 for compiling the plugin?

Also, I have tried to use MingW64 to compile the plugin, but cmake has
difficulties in finding the HDF5 installation:

"""

faltet@FRANCESCALT476E MINGW64 /c/Users/faltet/hdf5-blosc/build

$ HDF5_ROOT="/c/Program Files/HDF_Group/HDF5/1.10.1" cmake ..

System is unknown to cmake, create:

Platform/MINGW64_NT-10.0 to use this system, please send your config file
to cma ke@www.cmake.org so it can be added to cmake

Your CMakeCache.txt file was copied to CopyOfCMakeCache.txt. Please send
that fi le to cmake@www.cmake.org.

BLOSC_PREFIX='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_INSTALL_DIR='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_CMAKE_ARGS='-DCMAKE_INSTALL_PREFIX=/c/Users/
faltet/hdf5-blosc/build/blosc'

GIT_EXECUTABLE='/usr/bin/git.exe'

CMake Error at /usr/share/cmake-3.6.2/Modules/
FindPackageHandleStandardArgs.cmak e:148 (message):

  Could NOT find HDF5 (missing: HDF5_LIBRARIES HDF5_HL_LIBRARIES) (found

  version "1.10.1")

Call Stack (most recent call first):

  /usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmake:388
(_FPHSA _FAILURE_MESSAGE)

  /usr/share/cmake-3.6.2/Modules/FindHDF5.cmake:820
(find_package_handle_standar d_args)

  CMakeLists.txt:48 (find_package)

-- Configuring incomplete, errors occurred!

See also "/c/Users/faltet/hdf5-blosc/build/CMakeFiles/CMakeOutput.log".
"""

Thanks!

2017-06-28 22:25 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Francesc, I am getting this message, which is correct since I don't have
it compiled with zstd.

h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 myRGBA.f5 myRGBA-out.f5
HDF5-DIAG: Error detected in HDF5 (1.8.17) thread 10592:
  #000: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5D.c line 426 in H5Dclose(): can't decrement count on dataset ID
    major: Dataset
    minor: Unable to decrement reference count
  #001: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c line 1549 in H5I_dec_app_ref_always_close(): can't decrement ID ref count
    major: Object atom
    minor: Unable to decrement reference count
  #002: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c line 1491 in H5I_dec_app_ref(): can't decrement ID ref count
    major: Object atom
    minor: Unable to decrement reference count
  #003: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 1544 in H5D_close(): unable to destroy chunk cache
    major: Dataset
    minor: Unable to release object
  #004: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 5164 in H5D__chunk_dest(): unable to flush one or more raw data chunks
    major: Low-level I/O
    minor: Unable to flush data from cache
  #005: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2641 in H5D__chunk_cache_evict(): cannot flush indexed storage buffer
    major: Low-level I/O
    minor: Write failed
  #006: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2528 in H5D__chunk_flush_entry(): output pipeline failed
    major: Data filters
    minor: Filter operation failed
  #007: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c line 1412 in H5Z_pipeline(): filter returned failure
    major: Data filters
    minor: Write failed
  #008: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c line 190 in blosc_filter(): this Blosc library does not have support for the 'zstd' compressor, but only for: blosclz,lz4,lz4hc,zlib
    major: Data filters
    minor: Callback failed
  #009: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 1507 in H5D_close(): unable to flush cached dataset info
    major: Dataset
    minor: Write failed
  #010: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 2438 in H5D__flush_real(): unable to flush raw data
    major: Dataset
    minor: Unable to flush data from cache
  #011: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2112 in H5D__chunk_flush(): unable to flush one or more raw data chunks
    major: Dataset
    minor: Unable to flush data from cache
  #012: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2528 in H5D__chunk_flush_entry(): output pipeline failed
    major: Data filters
    minor: Filter operation failed
  #013: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c line 1412 in H5Z_pipeline(): filter returned failure
    major: Data filters
    minor: Write failed
  #014: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c line 190 in blosc_filter(): this Blosc library does not have support for the 'zstd' compressor, but only for: blosclz,lz4,lz4hc,zlib
    major: Data filters
    minor: Callback failed
h5repack error: <myRGBA.f5>: Could not copy data to: myRGBA-out.f5

But when using LZ4HC as filter it works fine:

Wrk $ h5repack -f UD=32001,8,0,0,0,0,0,9,1,2 myRGBA.f5 myRGBA-out.f5

Wrk $ ll

-rw-r--r-- 1 Wrk None 12M Jan 25 16:43 myRGBA.f5

-rw-r--r-- 1 Wrk None 5.0M Jun 28 22:18 myRGBA-out.f5

I'm using 1.8.17, evidently.

Btw, the restriction with the lib-prefix has the advantage that the HDF5
plugin loader does not look at DLL's such as "blosc.dll", it would not even
try to load it as a plugin. Just something better than "lib" would probably
be preferable, and independent of platform and compiler. I guess in your
version it even tries to load the blosc.dll itself as a plugin - which
could lead to issues if such a plugin would contain some startup code like
global c++ constructors or code in DllMain which does "something". That's
unlikely to be related to your problem though, I don't see from the output
what the problem could be, it works for me.

          Werner

On 28.06.2017 19:01, Francesc Alted wrote:

Werner, I think the lib- prefix does not apply to my case because I am
using VS2015 for compiling the libraries. But agreed that HDF5 taking
different conventions depending on whether a MSVC or GCC-based is a bit
confusing.

BTW, although the h5dump can read blosc files with the plugin, ptrepack
cannot create them on Windows:

C:\Users\faltet>h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5
carray1-repack.h5
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
h5repack error: <carray1-blosc.h5>: Could not copy data to:
carray1-repack.h5

I have tested with both 1.10.1 and 1.8.19 (above).

whereas it works perfectly well on a Mac box:

Francescs-MacBook-Pro:PyTables faltet$ h5repack -f
UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
Francescs-MacBook-Pro:PyTables faltet$ h5ls -v carray1-repack.h5
Opened "carray1-repack.h5" with sec2 driver.
carray Dataset {200/218, 300/300}
    Location: 1:800
    Links: 1
    Chunks: {218, 300} 65400 bytes
    Storage: 60000 logical bytes, 58 allocated bytes, 103448.28%
utilization
    Filter-0: blosc-32001 {2, 2, 1, 65400, 9, 1, 5, 5}
    Type: native unsigned char

Any hints?

2017-06-28 15:15 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Hi Francesc,

it took me a while to figure out this detail, too, I had the blosc.dll
in the PATH at first, and it seems to work under some circumstances but not
others... not entirely clear to me when it needs to be in the PATH or in
the calling's DLL's directory outside of the PATH.

There's some code in H5PL.c that checks for a lib prefix:

#ifndef __CYGWIN__
        if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
                (HDstrstr(dp->d_name, ".so") || HDstrstr(dp->d_name,
".dylib"))) {
#else
...

#endif

So I guess in your case that prefix check did not apply, whereas for me
using gcc under windows it did. Thus it seems best for compatibility to
keep the plugins named with lib- starting under Windows, once compiled that
C code should not matter whether it was produced by GCC or MSC. Otherwise
yes, the name does not matter indeed.

         Werner

On 28.06.2017 15:00, Francesc Alted wrote:

Hi Werner,

Right, what I was missing was basically moving the blosc.dll library
into the HDF5 plugin directory. I thought that putting blosc.dll in a
directory in the %PATH% was going to be enough, but apparently this is not
the case (I suppose this is a Windows trickery).

For what is worth, the name of the DLL plugin is not that important as I
have tried with libHDF5blosc.dll, libH5Zblosc.dll, H5Zblosc.dll and even
blosc_plugin.dll and all of them work. Apparently the HDF5 library tries
all the DLLs in the plugin directory and uses the one that registers the
necessary filter ID; pretty smart.

Thanks so much!

2017-06-28 14:31 GMT+02:00 Werner Benger <werner@cct.lsu.edu>:

Just to add:

under windows, the plugins need to start with lib as prefix. It's
technically not required, but the HDF5 plugin loader expects that. So the
liblz4.dll in my plugins dir is the LZ4 plugin,the libHDF5blosc.dll the
blosc-filter; the blosc.dll is used by the blosc filter and needs to be in
the same directory if compiled as dynamic library as well.

        Werner

On 28.06.2017 14:24, Werner Benger wrote:

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under
Windows, and this are the files as needed in the plugin directory that
HDF5 looks for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin
using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

          Werner

On 28.06.2017 13:44, Francesc Alted wrote:

Hi,

I have been trying to give support to HDF5 on Windows for dynamically
loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no
success so far.

I basically have compiled the plugin with:

> cl /I"C:\Program Files (x86)\blosc\include"
/I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c
/OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib"
/LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin",
but when I try to use a h5dump for getting the data of an HDF5 with some
datasets compressed with Blosc, I am getting:

>h5dump \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

      }
   }
}
}

When asking for more errors, I am getting a more informative message:

>h5dump --enable-error-stack \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
line 2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
line 3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open
directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery
in HDF5 is looking at and 2) which name the DLL should have (as per
manual, I am using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and
blosc.dll with no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so
as to direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if
it is of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5
backtrace of the plugin machinery would provide info about 1) which
directory it is looking at for finding the HDF5 plugin and 2) the name of
the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <%28225%29%20578-4809> Fax.: +1 225 578-5362 <%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <(225)%20578-4809> Fax.: +1 225 578-5362 <(225)%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.Hdf-forum@lists.hdfgroup.orghttp://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 <(225)%20578-4809> Fax.: +1 225 578-5362 <(225)%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

byrn · July 7, 2017, 7:03pm

This looks like the result if the hdf5 library and tool is not all using shared libraries.

Allen

···

________________________________________
From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Francesc Alted <faltet@gmail.com>
Sent: Friday, July 7, 2017 10:58:41 AM
To: HDF Users Discussion List
Subject: Re: [Hdf-forum] Dynamic filters on Windows

Hi Werner,

Yeah, the different in the number of parameters is curious. And no, all the hdf5-blosc plugin versions take 7 params (4 reserved, hence the 4 0s) and 3 for the actual compression parameters (complevel, shuffle, codec), so I don't quite understand why 8 (with 5 0s) works for me, but it is indeed the required number on Unix boxes (using HDF5 1.8.x there, so maybe the difference is just because HDF5 1.8.x and 1.10.x).

I have just tried with 7 params on Windows, but I am having the same problem again:

λ h5repack -v -f UD=32001,7,0,0,0,0,4,2,1 carray1-zlib.h5 carray1-repack.h5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <carray1-repack.h5>...
-----------------------------------------
Type Filter (Compression) Name
-----------------------------------------
group /
HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c line 1037 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3815 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3765 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
warning: could not create dataset </carray>. Applying original settings
dset /carray
<warning: could not apply the filter to /carray>

Anyway, for the record, I ended using ptrepack for converting HDF5 files into Blosc-compressed ones:

λ ptrepack --complib blosc:lz4 --complevel=5 --shuffle 1 carray1-zlib.h5 carray1-repack.h5 -o

λ ptdump carray1-repack.h5

/ (RootGroup) ''

/carray (CArray(200, 300), shuffle, blosc:lz4(5)) ''

Anyways, thanks for all the help,

Francesc

2017-07-07 16:18 GMT+02:00 Werner Benger <werner@cct.lsu.edu<mailto:werner@cct.lsu.edu>>:

Hi Francesc,

I got it to run with 1.10.1 and GCC 7.1 under MSYS2, kind of, but the 8-parameter makes it to hang forever, it only works with giving 7 parameters on h5repack for me:

/bin/arch-x86_64-w64-mingw32-OptDeb/h5repack -v -f UD=32001,7,0,0,0,0,4,2,1 myRGBA.f5 myRGBA-repack.f5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <myRGBA-repack.f5>...
-----------------------------------------
Type Filter (Compression) Name
...

dset UD (1.582:1) /t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/Height/Fragment[0x0x0]

...

The file looks all fine:

./bin/arch-x86_64-w64-mingw32-OptDeb/h5ls.exe -rv myRGBA-repack.f5/t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/ReturnNumber/Fragment[0x0x0]
Opened "myRGBA-repack.f5" with sec2 driver.
t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/ReturnNumber/Fragment[0x0x0] Dataset {1/1, 256/256, 256/256}
Data: Contiguous
Location: 1:4283257
Links: 1
Chunks: {1, 256, 256} 65536 bytes
Storage: 65536 logical bytes, 21807 allocated bytes, 300.53% utilization
Filter-0: blosc-32001 {2, 2, 1, 65536, 4, 2, 1}
Type: native unsigned char

whereas the setting with 8 parameters hangs forever:

./bin/arch-x86_64-w64-mingw32-OptDeb/h5repack -v -f UD=32001,8,0,0,0,0,0,4,2,1 myRGBA.f5 myRGBA-repack.f5

If you want to try my configuration, try this in MSYS2:

svn co https://subversion.assembla.com/svn/FiberHDF5/hdf5; cd hdf5; mingw32-make -j12

Maybe I am using an older version of blosc that doesn't like 8 parameters?

Werner

On 04.07.2017 15:50, Werner Benger wrote:

Hi,

I have not tried HDF 1.10.1 yet with Mingw, but wanted to give it a try in the next days anyway and can let you know how it goes. I'm not using cmake, but my own makefiles, I think you have access to it anyway, so for now with the 1.8.17 version. I can let you know once I got to check with 1.10.1 .

Werner

On 04.07.2017 14:35, Francesc Alted wrote:
Hi,

Today I spent some more time on this issue, and I recompiled everything (the Blosc library and its plugin) against HDF5 1.10.1 (the binaries from hdfgroup.org<http://hdfgroup.org>) in 64 bit mode. Again, I can read Blosc-compressed HDF5 files with h5ls and h5dump (so I am pretty sure that the plugin is correctly compiled), but h5repack is still failing:

"""
C:\tmp
λ h5repack -v -f UD=32001,8,0,0,0,0,0,9,1,2 carray1.h5 carray1-repack.h5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <carray1-repack.h5>...
-----------------------------------------
Type Filter (Compression) Name
-----------------------------------------
group /
HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c line 1037 in H5Pget_filter_by_id2(): can't
find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3815 in H5P_object_verify(): property
list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3765 in H5P_isa_class(): not a propert
y list
    major: Invalid arguments to routine
    minor: Inappropriate type
warning: could not create dataset </carray>. Applying original settings
dset /carray
<warning: could not apply the filter to /carray>

"""

At this point, I don't know what to do. I am using VS2017 Community Edition; could it be possible that I need VS2015 for compiling the plugin?

Also, I have tried to use MingW64 to compile the plugin, but cmake has difficulties in finding the HDF5 installation:

"""

faltet@FRANCESCALT476E MINGW64 /c/Users/faltet/hdf5-blosc/build

$ HDF5_ROOT="/c/Program Files/HDF_Group/HDF5/1.10.1" cmake ..

System is unknown to cmake, create:

Platform/MINGW64_NT-10.0 to use this system, please send your config file to cma ke@www.cmake.org<mailto:ke@www.cmake.org> so it can be added to cmake

Your CMakeCache.txt file was copied to CopyOfCMakeCache.txt. Please send that fi le to cmake@www.cmake.org<mailto:cmake@www.cmake.org>.

BLOSC_PREFIX='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_INSTALL_DIR='/c/Users/faltet/hdf5-blosc/build/blosc'

BLOSC_CMAKE_ARGS='-DCMAKE_INSTALL_PREFIX=/c/Users/faltet/hdf5-blosc/build/blosc'

GIT_EXECUTABLE='/usr/bin/git.exe'

CMake Error at /usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmak e:148 (message):

Could NOT find HDF5 (missing: HDF5_LIBRARIES HDF5_HL_LIBRARIES) (found

version "1.10.1")

Call Stack (most recent call first):

/usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA _FAILURE_MESSAGE)

/usr/share/cmake-3.6.2/Modules/FindHDF5.cmake:820 (find_package_handle_standar d_args)

CMakeLists.txt:48 (find_package)

-- Configuring incomplete, errors occurred!

See also "/c/Users/faltet/hdf5-blosc/build/CMakeFiles/CMakeOutput.log".

"""

Thanks!

2017-06-28 22:25 GMT+02:00 Werner Benger <werner@cct.lsu.edu<mailto:werner@cct.lsu.edu>>:

Francesc, I am getting this message, which is correct since I don't have it compiled with zstd.

h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 myRGBA.f5 myRGBA-out.f5
HDF5-DIAG: Error detected in HDF5 (1.8.17) thread 10592:
  #000: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5D.c line 426 in H5Dclose(): can't decrement count on dataset ID
    major: Dataset
    minor: Unable to decrement reference count
  #001: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c line 1549 in H5I_dec_app_ref_always_close(): can't decrement ID ref count
    major: Object atom
    minor: Unable to decrement reference count
  #002: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c line 1491 in H5I_dec_app_ref(): can't decrement ID ref count
    major: Object atom
    minor: Unable to decrement reference count
  #003: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 1544 in H5D_close(): unable to destroy chunk cache
    major: Dataset
    minor: Unable to release object
  #004: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 5164 in H5D__chunk_dest(): unable to flush one or more raw data chunks
    major: Low-level I/O
    minor: Unable to flush data from cache
  #005: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2641 in H5D__chunk_cache_evict(): cannot flush indexed storage buffer
    major: Low-level I/O
    minor: Write failed
  #006: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2528 in H5D__chunk_flush_entry(): output pipeline failed
    major: Data filters
    minor: Filter operation failed
  #007: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c line 1412 in H5Z_pipeline(): filter returned failure
    major: Data filters
    minor: Write failed
  #008: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c line 190 in blosc_filter(): this Blosc library does not have support for the 'zstd' compressor, but only for: blosclz,lz4,lz4hc,zlib
    major: Data filters
    minor: Callback failed
  #009: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 1507 in H5D_close(): unable to flush cached dataset info
    major: Dataset
    minor: Write failed
  #010: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c line 2438 in H5D__flush_real(): unable to flush raw data
    major: Dataset
    minor: Unable to flush data from cache
  #011: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2112 in H5D__chunk_flush(): unable to flush one or more raw data chunks
    major: Dataset
    minor: Unable to flush data from cache
  #012: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c line 2528 in H5D__chunk_flush_entry(): output pipeline failed
    major: Data filters
    minor: Filter operation failed
  #013: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c line 1412 in H5Z_pipeline(): filter returned failure
    major: Data filters
    minor: Write failed
  #014: C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c line 190 in blosc_filter(): this Blosc library does not have support for the 'zstd' compressor, but only for: blosclz,lz4,lz4hc,zlib
    major: Data filters
    minor: Callback failed
h5repack error: <myRGBA.f5>: Could not copy data to: myRGBA-out.f5

But when using LZ4HC as filter it works fine:

Wrk $ h5repack -f UD=32001,8,0,0,0,0,0,9,1,2 myRGBA.f5 myRGBA-out.f5

Wrk $ ll

-rw-r--r-- 1 Wrk None 12M Jan 25 16:43 myRGBA.f5

-rw-r--r-- 1 Wrk None 5.0M Jun 28 22:18 myRGBA-out.f5

I'm using 1.8.17, evidently.

Btw, the restriction with the lib-prefix has the advantage that the HDF5 plugin loader does not look at DLL's such as "blosc.dll", it would not even try to load it as a plugin. Just something better than "lib" would probably be preferable, and independent of platform and compiler. I guess in your version it even tries to load the blosc.dll itself as a plugin - which could lead to issues if such a plugin would contain some startup code like global c++ constructors or code in DllMain which does "something". That's unlikely to be related to your problem though, I don't see from the output what the problem could be, it works for me.

Werner

On 28.06.2017 19:01, Francesc Alted wrote:
Werner, I think the lib- prefix does not apply to my case because I am using VS2015 for compiling the libraries. But agreed that HDF5 taking different conventions depending on whether a MSVC or GCC-based is a bit confusing.

BTW, although the h5dump can read blosc files with the plugin, ptrepack cannot create them on Windows:

C:\Users\faltet>h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
  #000: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c line 1100 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c line 3379 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c line 3329 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
h5repack error: <carray1-blosc.h5>: Could not copy data to: carray1-repack.h5

I have tested with both 1.10.1 and 1.8.19 (above).

whereas it works perfectly well on a Mac box:

Francescs-MacBook-Pro:PyTables faltet$ h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
Francescs-MacBook-Pro:PyTables faltet$ h5ls -v carray1-repack.h5
Opened "carray1-repack.h5" with sec2 driver.
carray Dataset {200/218, 300/300}
    Location: 1:800
    Links: 1
    Chunks: {218, 300} 65400 bytes
    Storage: 60000 logical bytes, 58 allocated bytes, 103448.28% utilization
    Filter-0: blosc-32001 {2, 2, 1, 65400, 9, 1, 5, 5}
    Type: native unsigned char

Any hints?

2017-06-28 15:15 GMT+02:00 Werner Benger <werner@cct.lsu.edu<mailto:werner@cct.lsu.edu>>:

Hi Francesc,

it took me a while to figure out this detail, too, I had the blosc.dll in the PATH at first, and it seems to work under some circumstances but not others... not entirely clear to me when it needs to be in the PATH or in the calling's DLL's directory outside of the PATH.

There's some code in H5PL.c that checks for a lib prefix:

#ifndef __CYGWIN__
if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
(HDstrstr(dp->d_name, ".so") || HDstrstr(dp->d_name, ".dylib"))) {
#else
...

#endif

So I guess in your case that prefix check did not apply, whereas for me using gcc under windows it did. Thus it seems best for compatibility to keep the plugins named with lib- starting under Windows, once compiled that C code should not matter whether it was produced by GCC or MSC. Otherwise yes, the name does not matter indeed.

Werner

On 28.06.2017 15:00, Francesc Alted wrote:
Hi Werner,

Right, what I was missing was basically moving the blosc.dll library into the HDF5 plugin directory. I thought that putting blosc.dll in a directory in the %PATH% was going to be enough, but apparently this is not the case (I suppose this is a Windows trickery).

For what is worth, the name of the DLL plugin is not that important as I have tried with libHDF5blosc.dll, libH5Zblosc.dll, H5Zblosc.dll and even blosc_plugin.dll and all of them work. Apparently the HDF5 library tries all the DLLs in the plugin directory and uses the one that registers the necessary filter ID; pretty smart.

Thanks so much!

2017-06-28 14:31 GMT+02:00 Werner Benger <werner@cct.lsu.edu<mailto:werner@cct.lsu.edu>>:

Just to add:

under windows, the plugins need to start with lib as prefix. It's technically not required, but the HDF5 plugin loader expects that. So the liblz4.dll in my plugins dir is the LZ4 plugin,the libHDF5blosc.dll the blosc-filter; the blosc.dll is used by the blosc filter and needs to be in the same directory if compiled as dynamic library as well.

Werner

On 28.06.2017 14:24, Werner Benger wrote:

Hi,

I am using HDF5 with blosc dynamic plugin loading regularly under Windows, and this are the files as needed in the plugin directory that HDF5 looks for:

HDF5Plugins $ ll
total 1.2M
-rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
-rwxr-xr-x 1 Wrk None 330K Jun 26 23:30 libHDF5blosc.dll*
-rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

The blosc.dll is the blosc library, libHDF5blosc.dll is the HDF5 plugin using that library.

I'm using Mingw64, which is gcc 6.3 under MSYS2 .

Werner

On 28.06.2017 13:44, Francesc Alted wrote:
Hi,

I have been trying to give support to HDF5 on Windows for dynamically loading the Blosc plugin (https://github.com/Blosc/hdf5-blosc), but no success so far.

I basically have compiled the plugin with:

cl /I"C:\Program Files (x86)\blosc\include" /I"C:\HDF_Group\HDF5\1.8.12\include" libH5Zblosc.c blosc_filter.c /OUT:libH5Zblosc.dll /LD /link /LIBPATH:"C:\Program Files (x86)\blosc\lib" /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib" blosc.lib hdf5.lib

and then copied the libH5Zblosc.dll to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when I try to use a h5dump for getting the data of an HDF5 with some datasets compressed with Blosc, I am getting:

h5dump \tmp\carray1-blosc.h5

HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {h5dump error: unable to print data

}
}
}
}

When asking for more errors, I am getting a more informative message:

>h5dump --enable-error-stack \tmp\carray1-blosc.h5
HDF5 "\tmp\carray1-blosc.h5" {
GROUP "/" {
   DATASET "carray" {
      DATATYPE H5T_STD_U8LE
      DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
      DATA {HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c line 171 in H5Dread(): can't read data
    major: Dataset
    minor: Read failed
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c line 544 in H5D__read(): can't read data
    major: Dataset
    minor: Read failed
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line 2050 in H5D__chunk_read(): unable to read raw data chunk
    major: Low-level I/O
    minor: Read failed
  #003: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c line 3405 in H5D__chunk_lock(): data pipeline read failed
    major: Data filters
    minor: Filter operation failed
  #004: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c line 1349 in H5Z_pipeline(): required filter 'blosc' is not registered
    major: Data filters
    minor: Read failed
  #005: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c line 389 in H5PL_load(): search in paths failed
    major: Plugin for dynamically loaded library
    minor: Can't get value
  #006: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open directory
    major: Plugin for dynamically loaded library
    minor: Can't open directory or file
h5dump error: unable to print data

      }
   }
}
}
H5tools-DIAG: Error detected in HDF5:tools (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c line 1639 in h5tools_dump_simple_dset(): H5Dread failed
    major: Failure in tools library
    minor: error in function

I suppose the meaningful part is here:

10vs14\build\hdfsrc\src\H5PL.c line 812 in H5PL__find(): can't open directory

b
ut I have no clues on 1) what directory the dynamic plugin machinery in HDF5 is looking at and 2) which name the DLL should have (as per manual, I am using libH5Zblosc.dll, but I have tried with H5Zblosc.dll and blosc.dll with no success).

I have also tried to use the HDF5_PLUGIN_PATH environment variable, so as to direct the plugin machinery in HDF5 to look into the specific
%ALLUSERSPROFILE%/hdf5/lib/plugin
place,
but no luck.

I tried with HDF5 1.8.12 and 1.10.1, with same results. Finally, if it is of any help, I am using Windows 10 64 bit.

As a suggestion, it may help to debug situations like this if the HDF5 backtrace of the plugin machinery would provide info about 1) which directory it is looking at for finding the HDF5 plugin and 2) the name of the DLL that it is trying to load.

Thanks in advance,

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809<tel:%28225%29%20578-4809> Fax.: +1 225 578-5362<tel:%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809<tel:%28225%29%20578-4809> Fax.: +1 225 578-5362<tel:%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809<tel:%28225%29%20578-4809> Fax.: +1 225 578-5362<tel:%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809<tel:%28225%29%20578-4809> Fax.: +1 225 578-5362<tel:%28225%29%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809<tel:(225)%20578-4809> Fax.: +1 225 578-5362<tel:(225)%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809<tel:(225)%20578-4809> Fax.: +1 225 578-5362<tel:(225)%20578-5362>

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
Francesc Alted

werner · July 7, 2017, 7:50pm

Hi Francesc,

I had the same behavior with 1.8.17 . Maybe if you have a moment you can try my config and compare what it does differently to your HDF5, if you have the msys2/mingw64 already installed, it's just a one-liner. Your problem seems to be essentially different.

The version with 8 numbers seems to get stuck somewhere down of H5Dclose(), that far I could trace the code, so probably it is when the filter is applied to writing the cached dataset when closing it, just an assumption, but its difficult to trace, it seems more infinite loop, not a segmentation fault.

Werner

···

On 07.07.2017 17:58, Francesc Alted wrote:

Hi Werner,

Yeah, the different in the number of parameters is curious. And no, all the hdf5-blosc plugin versions take 7 params (4 reserved, hence the 4 0s) and 3 for the actual compression parameters (complevel, shuffle, codec), so I don't quite understand why 8 (with 5 0s) works for me, but it is indeed the required number on Unix boxes (using HDF5 1.8.x there, so maybe the difference is just because HDF5 1.8.x and 1.10.x).

I have just tried with 7 params on Windows, but I am having the same problem again:

λ h5repack -v -f UD=32001,7,0,0,0,0,4,2,1 carray1-zlib.h5 carray1-repack.h5
Objects to modify layout are...
Objects to apply filter are...
User Defined 32001
Making file <carray1-repack.h5>...
-----------------------------------------
Type Filter (Compression) Name
-----------------------------------------
group /
HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
  #000: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c line 1037 in H5Pget_filter_by_id2(): can't find object for ID
    major: Object atom
    minor: Unable to find atom information (already closed?)
  #001: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3815 in H5P_object_verify(): property list is not a member of the class
    major: Property lists
    minor: Unable to register new atom
  #002: C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c line 3765 in H5P_isa_class(): not a property list
    major: Invalid arguments to routine
    minor: Inappropriate type
warning: could not create dataset </carray>. Applying original settings
dset /carray
<warning: could not apply the filter to /carray>

Anyway, for the record, I ended using ptrepack for converting HDF5 files into Blosc-compressed ones:

λptrepack --complib blosc:lz4 --complevel=5 --shuffle 1 carray1-zlib.h5 carray1-repack.h5 -o

λ ptdump carray1-repack.h5

/ (RootGroup) ''

/carray (CArray(200, 300), shuffle, blosc:lz4(5)) ''

Anyways, thanks for all the help,

Francesc

2017-07-07 16:18 GMT+02:00 Werner Benger <werner@cct.lsu.edu <mailto:werner@cct.lsu.edu>>:

    Hi Francesc,

     I got it to run with 1.10.1 and GCC 7.1 under MSYS2, kind of, but
    the 8-parameter makes it to hang forever, it only works with
    giving 7 parameters on h5repack for me:

    /bin/arch-x86_64-w64-mingw32-OptDeb/h5repack -v -f UD=32001,7,0,0,0,0,4,2,1 myRGBA.f5 myRGBA-repack.f5
    Objects to modify layout are...
    Objects to apply filter are...
      User Defined 32001
    Making file <myRGBA-repack.f5>...
    -----------------------------------------
      Type Filter (Compression) Name
    ...

      dset UD (1.582:1) /t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/Height/Fragment[0x0x0]

    ...

    The file looks all fine:

    ./bin/arch-x86_64-w64-mingw32-OptDeb/h5ls.exe -rv
    myRGBA-repack.f5/t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/ReturnNumber/Fragment[0x0x0]
    Opened "myRGBA-repack.f5" with sec2 driver.
    t=000000000.0000000000/RGBA/Points/StandardCartesianChart3D/ReturnNumber/Fragment[0x0x0]
    Dataset {1/1, 256/256, 256/256}
    Data: Contiguous
    Location: 1:4283257
    Links: 1
    Chunks: {1, 256, 256} 65536 bytes
    Storage: 65536 logical bytes, 21807 allocated bytes, 300.53%
    utilization
    Filter-0: blosc-32001 {2, 2, 1, 65536, 4, 2, 1}
    Type: native unsigned char

    whereas the setting with 8 parameters hangs forever:

    ./bin/arch-x86_64-w64-mingw32-OptDeb/h5repack -v -f
    UD=32001,8,0,0,0,0,0,4,2,1 myRGBA.f5 myRGBA-repack.f5

    If you want to try my configuration, try this in MSYS2:

    svn co https://subversion.assembla.com/svn/FiberHDF5/hdf5
    <https://subversion.assembla.com/svn/FiberHDF5/hdf5>; cd hdf5;
    mingw32-make -j12

    Maybe I am using an older version of blosc that doesn't like 8
    parameters?

                Werner

    On 04.07.2017 15:50, Werner Benger wrote:

    Hi,

     I have not tried HDF 1.10.1 yet with Mingw, but wanted to give
    it a try in the next days anyway and can let you know how it
    goes. I'm not using cmake, but my own makefiles, I think you have
    access to it anyway, so for now with the 1.8.17 version. I can
    let you know once I got to check with 1.10.1 .

            Werner

    On 04.07.2017 14:35, Francesc Alted wrote:

    Hi,

    Today I spent some more time on this issue, and I recompiled
    everything (the Blosc library and its plugin) against HDF5
    1.10.1 (the binaries from hdfgroup.org <http://hdfgroup.org>) in
    64 bit mode. Again, I can read Blosc-compressed HDF5 files with
    h5ls and h5dump (so I am pretty sure that the plugin is
    correctly compiled), but h5repack is still failing:

    """
    C:\tmp
    λ h5repack -v -f UD=32001,8,0,0,0,0,0,9,1,2 carray1.h5
    carray1-repack.h5
    Objects to modify layout are...
    Objects to apply filter are...
     User Defined 32001
    Making file <carray1-repack.h5>...
    -----------------------------------------
     Type Filter (Compression) Name
    -----------------------------------------
     group /
    HDF5-DIAG: Error detected in HDF5 (1.10.1) thread 0:
      #000:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pocpl.c
    line 1037 in H5Pget_filter_by_id2(): can't
     find object for ID
        major: Object atom
        minor: Unable to find atom information (already closed?)
      #001:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c
    line 3815 in H5P_object_verify(): property
    list is not a member of the class
        major: Property lists
        minor: Unable to register new atom
      #002:
    C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Pint.c
    line 3765 in H5P_isa_class(): not a propert
    y list
        major: Invalid arguments to routine
        minor: Inappropriate type
     warning: could not create dataset </carray>. Applying original
    settings
     dset /carray
     <warning: could not apply the filter to /carray>
    """

    At this point, I don't know what to do. I am using VS2017
    Community Edition; could it be possible that I need VS2015 for
    compiling the plugin?

    Also, I have tried to use MingW64 to compile the plugin, but
    cmake has difficulties in finding the HDF5 installation:

    """

    faltet@FRANCESCALT476E MINGW64/c/Users/faltet/hdf5-blosc/build

    $ HDF5_ROOT="/c/Program Files/HDF_Group/HDF5/1.10.1" cmake ..

    System is unknown to cmake, create:

    Platform/MINGW64_NT-10.0 to use this system, please send your
    config file to cma ke@www.cmake.org <mailto:ke@www.cmake.org> so
    it can be added to cmake

    Your CMakeCache.txt file was copied to CopyOfCMakeCache.txt.
    Please send that fi le to cmake@www.cmake.org
    <mailto:cmake@www.cmake.org>.

    BLOSC_PREFIX='/c/Users/faltet/hdf5-blosc/build/blosc'

    BLOSC_INSTALL_DIR='/c/Users/faltet/hdf5-blosc/build/blosc'

    BLOSC_CMAKE_ARGS='-DCMAKE_INSTALL_PREFIX=/c/Users/faltet/hdf5-blosc/build/blosc'

    GIT_EXECUTABLE='/usr/bin/git.exe'

    CMake Error at
    /usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmak
          e:148 (message):

      Could NOT find HDF5 (missing: HDF5_LIBRARIES
    HDF5_HL_LIBRARIES) (found

    version "1.10.1")

    Call Stack (most recent call first):

    /usr/share/cmake-3.6.2/Modules/FindPackageHandleStandardArgs.cmake:388
    (_FPHSA _FAILURE_MESSAGE)

    /usr/share/cmake-3.6.2/Modules/FindHDF5.cmake:820
    (find_package_handle_standar d_args)

    CMakeLists.txt:48 (find_package)

    -- Configuring incomplete, errors occurred!

    See also
    "/c/Users/faltet/hdf5-blosc/build/CMakeFiles/CMakeOutput.log".

    """
    Thanks!

    2017-06-28 22:25 GMT+02:00 Werner Benger <werner@cct.lsu.edu
    <mailto:werner@cct.lsu.edu>>:

        Francesc, I am getting this message, which is correct since
        I don't have it compiled with zstd.

         h5repack -f UD=32001,8,0,0,0,0,0,9,1,5 myRGBA.f5
        myRGBA-out.f5 HDF5-DIAG: Error detected in HDF5 (1.8.17)
        thread 10592: #000:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5D.c
        line 426 in H5Dclose(): can't decrement count on dataset ID
            major: Dataset minor: Unable to decrement reference
        count #001:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c
        line 1549 in H5I_dec_app_ref_always_close(): can't decrement
        ID ref count major: Object atom minor: Unable to
        decrement reference count #002:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5I.c
        line 1491 in H5I_dec_app_ref(): can't decrement ID ref count
            major: Object atom minor: Unable to decrement
        reference count #003:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
        line 1544 in H5D_close(): unable to destroy chunk cache major: Dataset minor: Unable to release object #004:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
        line 5164 in H5D__chunk_dest(): unable to flush one or more
        raw data chunks major: Low-level I/O minor: Unable
        to flush data from cache #005:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
        line 2641 in H5D__chunk_cache_evict(): cannot flush indexed
        storage buffer major: Low-level I/O minor: Write
        failed #006:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
        line 2528 in H5D__chunk_flush_entry(): output pipeline
        failed major: Data filters minor: Filter operation
        failed #007:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c
        line 1412 in H5Z_pipeline(): filter returned failure major: Data filters minor: Write failed #008:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c
        line 190 in blosc_filter(): this Blosc library does not have
        support for the 'zstd' compressor, but only for:
        blosclz,lz4,lz4hc,zlib major: Data filters minor:
        Callback failed #009:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
        line 1507 in H5D_close(): unable to flush cached dataset
        info major: Dataset minor: Write failed #010:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dint.c
        line 2438 in H5D__flush_real(): unable to flush raw data major: Dataset minor: Unable to flush data from cache #011:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
        line 2112 in H5D__chunk_flush(): unable to flush one or more
        raw data chunks major: Dataset minor: Unable to
        flush data from cache #012:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Dchunk.c
        line 2528 in H5D__chunk_flush_entry(): output pipeline
        failed major: Data filters minor: Filter operation
        failed #013:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/hdf5-1.8.17/H5Z.c
        line 1412 in H5Z_pipeline(): filter returned failure major: Data filters minor: Write failed #014:
        C:/msys64/home/Wrk/vish/fish/fiber/FiberHDF5/h5zblosc/blosc_filter.c
        line 190 in blosc_filter(): this Blosc library does not have
        support for the 'zstd' compressor, but only for:
        blosclz,lz4,lz4hc,zlib major: Data filters minor:
        Callback failed h5repack error: <myRGBA.f5>: Could not copy
        data to: myRGBA-out.f5

        But when using LZ4HC as filter it works fine:

        Wrk $ h5repack -f UD=32001,8,0,0,0,0,0,9,1,2 myRGBA.f5
        myRGBA-out.f5

        Wrk $ ll

        -rw-r--r-- 1 Wrk None 12M Jan 25 16:43 myRGBA.f5

        -rw-r--r-- 1 Wrk None 5.0M Jun 28 22:18 myRGBA-out.f5

        I'm using 1.8.17, evidently.

        Btw, the restriction with the lib-prefix has the advantage
        that the HDF5 plugin loader does not look at DLL's such as
        "blosc.dll", it would not even try to load it as a plugin.
        Just something better than "lib" would probably be
        preferable, and independent of platform and compiler. I
        guess in your version it even tries to load the blosc.dll
        itself as a plugin - which could lead to issues if such a
        plugin would contain some startup code like global c++
        constructors or code in DllMain which does "something".
        That's unlikely to be related to your problem though, I
        don't see from the output what the problem could be, it
        works for me.

                  Werner

        On 28.06.2017 19:01, Francesc Alted wrote:

        Werner, I think the lib- prefix does not apply to my case
        because I am using VS2015 for compiling the libraries. But
        agreed that HDF5 taking different conventions depending on
        whether a MSVC or GCC-based is a bit confusing.

        BTW, although the h5dump can read blosc files with the
        plugin, ptrepack cannot create them on Windows:

        C:\Users\faltet>h5repack -f UD=32001,8,0,0,0,0,0,9,1,5
        carray1-blosc.h5 carray1-repack.h5
        HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
          #000:
        C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
        line 1100 in H5Pget_filter_by_id2(): can't find object for ID
            major: Object atom
            minor: Unable to find atom information (already closed?)
          #001:
        C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
        line 3379 in H5P_object_verify(): property list is not a
        member of the class
            major: Property lists
            minor: Unable to register new atom
          #002:
        C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
        line 3329 in H5P_isa_class(): not a property list
            major: Invalid arguments to routine
            minor: Inappropriate type
        HDF5-DIAG: Error detected in HDF5 (1.8.19) thread 0:
          #000:
        C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pocpl.c
        line 1100 in H5Pget_filter_by_id2(): can't find object for ID
            major: Object atom
            minor: Unable to find atom information (already closed?)
          #001:
        C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
        line 3379 in H5P_object_verify(): property list is not a
        member of the class
            major: Property lists
            minor: Unable to register new atom
          #002:
        C:\Users\buildbot\Buildbot\hdf518-StdRelease-code-vs14\build\hdfsrc\src\H5Pint.c
        line 3329 in H5P_isa_class(): not a property list
            major: Invalid arguments to routine
            minor: Inappropriate type
        h5repack error: <carray1-blosc.h5>: Could not copy data to:
        carray1-repack.h5

        I have tested with both 1.10.1 and 1.8.19 (above).

        whereas it works perfectly well on a Mac box:

        Francescs-MacBook-Pro:PyTables faltet$ h5repack -f
        UD=32001,8,0,0,0,0,0,9,1,5 carray1-blosc.h5 carray1-repack.h5
        Francescs-MacBook-Pro:PyTables faltet$ h5ls -v
        carray1-repack.h5
        Opened "carray1-repack.h5" with sec2 driver.
        carray Dataset {200/218, 300/300}
        Location: 1:800
        Links: 1
        Chunks: {218, 300} 65400 bytes
        Storage: 60000 logical bytes, 58 allocated bytes,
        103448.28% utilization
        Filter-0: blosc-32001 {2, 2, 1, 65400, 9, 1, 5, 5}
        Type: native unsigned char

        Any hints?

        2017-06-28 15:15 GMT+02:00 Werner Benger
        <werner@cct.lsu.edu <mailto:werner@cct.lsu.edu>>:

            Hi Francesc,

             it took me a while to figure out this detail, too, I
            had the blosc.dll in the PATH at first, and it seems to
            work under some circumstances but not others... not
            entirely clear to me when it needs to be in the PATH or
            in the calling's DLL's directory outside of the PATH.

            There's some code in H5PL.c that checks for a lib prefix:

            #ifndef __CYGWIN__
            if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
            (HDstrstr(dp->d_name, ".so") || HDstrstr(dp->d_name,
            ".dylib"))) {
            #else
            ...

            #endif

            So I guess in your case that prefix check did not
            apply, whereas for me using gcc under windows it did.
            Thus it seems best for compatibility to keep the
            plugins named with lib- starting under Windows, once
            compiled that C code should not matter whether it was
            produced by GCC or MSC. Otherwise yes, the name does
            not matter indeed.

                     Werner

            On 28.06.2017 15:00, Francesc Alted wrote:

            Hi Werner,

            Right, what I was missing was basically moving the
            blosc.dll library into the HDF5 plugin directory. I
            thought that putting blosc.dll in a directory in the
            %PATH% was going to be enough, but apparently this is
            not the case (I suppose this is a Windows trickery).

            For what is worth, the name of the DLL plugin is not
            that important as I have tried with libHDF5blosc.dll,
            libH5Zblosc.dll, H5Zblosc.dll and even
            blosc_plugin.dll and all of them work. Apparently the
            HDF5 library tries all the DLLs in the plugin
            directory and uses the one that registers the
            necessary filter ID; pretty smart.

            Thanks so much!

            2017-06-28 14:31 GMT+02:00 Werner Benger
            <werner@cct.lsu.edu <mailto:werner@cct.lsu.edu>>:

                Just to add:

                 under windows, the plugins need to start with lib
                as prefix. It's technically not required, but the
                HDF5 plugin loader expects that. So the liblz4.dll
                in my plugins dir is the LZ4 plugin,the
                libHDF5blosc.dll the blosc-filter; the blosc.dll
                is used by the blosc filter and needs to be in the
                same directory if compiled as dynamic library as well.

                Werner

                On 28.06.2017 14:24, Werner Benger wrote:

                Hi,

                 I am using HDF5 with blosc dynamic plugin
                loading regularly under Windows, and this are
                the files as needed in the plugin directory that
                HDF5 looks for:

                HDF5Plugins $ ll
                total 1.2M
                -rwxr-xr-x 1 Wrk None 382K Jun 26 23:30 blosc.dll*
                -rwxr-xr-x 1 Wrk None 330K Jun 26 23:30
                libHDF5blosc.dll*
                -rwxr-xr-x 1 Wrk None 410K Jun 26 23:30 liblz4.dll*

                The blosc.dll is the blosc library,
                libHDF5blosc.dll is the HDF5 plugin using that
                library.

                I'm using Mingw64, which is gcc 6.3 under MSYS2 .

                Werner

                On 28.06.2017 13:44, Francesc Alted wrote:

                Hi,

                I have been trying to give support to HDF5 on
                Windows for dynamically loading the Blosc plugin
                (https://github.com/Blosc/hdf5-blosc
                <https://github.com/Blosc/hdf5-blosc>), but no
                success so far.

                I basically have compiled the plugin with:

                > cl /I"C:\Program Files (x86)\blosc\include"
                /I"C:\HDF_Group\HDF5\1.8.12\include"
                libH5Zblosc.c blosc_filter.c
                /OUT:libH5Zblosc.dll /LD /link
                /LIBPATH:"C:\Program Files (x86)\blosc\lib"
                /LIBPATH:"C:\HDF_Group\HDF5\1.8.12\lib"
                blosc.lib hdf5.lib

                and then copied the libH5Zblosc.dll
                to "%ALLUSERSPROFILE%/hdf5/lib/plugin", but when
                I try to use a h5dump for getting the data of an
                HDF5 with some datasets compressed with Blosc, I
                am getting:

                >h5dump \tmp\carray1-blosc.h5
                HDF5 "\tmp\carray1-blosc.h5" {
                GROUP "/" {
                 DATASET "carray" {
                DATATYPE H5T_STD_U8LE
                DATASPACE SIMPLE { ( 200, 300 ) / ( 218, 300 ) }
                DATA {h5dump error: unable to print data

                }
                   }
                }

                When asking for more errors, I am getting a
                more informative message:

                >h5dump --enable-error-stack \tmp\carray1-blosc.h5
                HDF5 "\tmp\carray1-blosc.h5" {
                GROUP "/" {
                 DATASET "carray" {
                    DATATYPE H5T_STD_U8LE
                    DATASPACE SIMPLE { ( 200, 300 ) / ( 218,
                300 ) }
                    DATA {HDF5-DIAG: Error detected in HDF5
                (1.10.1) thread 0:
                #000:
                C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
                line 171 in H5Dread(): can't read data
                  major: Dataset
                  minor: Read failed
                #001:
                C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dio.c
                line 544 in H5D__read(): can't read data
                  major: Dataset
                  minor: Read failed
                #002:
                C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
                line 2050 in H5D__chunk_read(): unable to read
                raw data chunk
                  major: Low-level I/O
                  minor: Read failed
                #003:
                C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Dchunk.c
                line 3405 in H5D__chunk_lock(): data pipeline
                read failed
                  major: Data filters
                  minor: Filter operation failed
                #004:
                C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5Z.c
                line 1349 in H5Z_pipeline(): required filter
                'blosc' is not registered
                  major: Data filters
                  minor: Read failed
                #005:
                C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
                line 389 in H5PL_load(): search in paths failed
                  major: Plugin for dynamically loaded library
                  minor: Can't get value
                #006:
                C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\src\H5PL.c
                line 812 in H5PL__find(): can't open directory
                  major: Plugin for dynamically loaded library
                  minor: Can't open directory or file
                h5dump error: unable to print data

                    }
                 }
                }
                H5tools-DIAG: Error detected in HDF5:tools
                (1.10.1) thread 0:
                #000:
                C:\autotest\hdf5110-StdRelease-code-10vs14\build\hdfsrc\tools\lib\h5tools_dump.c
                line 1639 in h5tools_dump_simple_dset(): H5Dread
                failed
                  major: Failure in tools library
                  minor: error in function

                I suppose the meaningful part is here:

                10vs14\build\hdfsrc\src\H5PL.c line 812 in
                H5PL__find(): can't open directory

                b
                ut I have no clues on 1) what directory the
                dynamic plugin machinery in HDF5 is looking at
                and 2) which name the DLL should have (as per
                manual, I am using libH5Zblosc.dll, but I have
                tried with H5Zblosc.dll and blosc.dll with no
                success).

                I have also tried to use the HDF5_PLUGIN_PATH
                environment variable, so as to direct the plugin
                machinery in HDF5 to look into the specific
                %ALLUSERSPROFILE%/hdf5/lib/plugin
                 place,
                but no luck.

                I tried with HDF5 1.8.12 and 1.10.1, with same
                results. Finally, if it is of any help, I am
                using Windows 10 64 bit.

                As a suggestion, it may help to debug
                situations like this if the HDF5 backtrace of
                the plugin machinery would provide info about 1)
                which directory it is looking at for finding the
                HDF5 plugin and 2) the name of the DLL that it
                is trying to load.

                Thanks in advance,

                -- Francesc Alted

                _______________________________________________
                Hdf-forum is for HDF software users discussion.
                Hdf-forum@lists.hdfgroup.org
                <mailto:Hdf-forum@lists.hdfgroup.org>
                http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
                <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
                Twitter:https://twitter.com/hdf5

                -- ___________________________________________________________________________
                Dr. Werner Benger Visualization Research
                Center for Computation & Technology at Louisiana State University (CCT/LSU)
                2019 Digital Media Center, Baton Rouge, Louisiana 70803
                Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

                _______________________________________________
                Hdf-forum is for HDF software users discussion.
                Hdf-forum@lists.hdfgroup.org
                <mailto:Hdf-forum@lists.hdfgroup.org>
                http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
                <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
                Twitter:https://twitter.com/hdf5

                -- ___________________________________________________________________________
                Dr. Werner Benger Visualization Research
                Center for Computation & Technology at Louisiana State University (CCT/LSU)
                2019 Digital Media Center, Baton Rouge, Louisiana 70803
                Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

                _______________________________________________
                Hdf-forum is for HDF software users discussion.
                Hdf-forum@lists.hdfgroup.org
                <mailto:Hdf-forum@lists.hdfgroup.org>
                http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
                <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
                Twitter: https://twitter.com/hdf5

            -- Francesc Alted

            _______________________________________________
            Hdf-forum is for HDF software users discussion.
            Hdf-forum@lists.hdfgroup.org
            <mailto:Hdf-forum@lists.hdfgroup.org>
            http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
            <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
            Twitter:https://twitter.com/hdf5

            -- ___________________________________________________________________________
            Dr. Werner Benger Visualization Research
            Center for Computation & Technology at Louisiana State University (CCT/LSU)
            2019 Digital Media Center, Baton Rouge, Louisiana 70803
            Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

            _______________________________________________
            Hdf-forum is for HDF software users discussion.
            Hdf-forum@lists.hdfgroup.org
            <mailto:Hdf-forum@lists.hdfgroup.org>
            http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
            <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
            Twitter: https://twitter.com/hdf5

        -- Francesc Alted

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter:https://twitter.com/hdf5

        -- ___________________________________________________________________________
        Dr. Werner Benger Visualization Research
        Center for Computation & Technology at Louisiana State University (CCT/LSU)
        2019 Digital Media Center, Baton Rouge, Louisiana 70803
        Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

        _______________________________________________
        Hdf-forum is for HDF software users discussion.
        Hdf-forum@lists.hdfgroup.org
        <mailto:Hdf-forum@lists.hdfgroup.org>
        http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
        <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
        Twitter: https://twitter.com/hdf5

    -- Francesc Alted

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter:https://twitter.com/hdf5

    -- ___________________________________________________________________________
    Dr. Werner Benger Visualization Research
    Center for Computation & Technology at Louisiana State University (CCT/LSU)
    2019 Digital Media Center, Baton Rouge, Louisiana 70803
    Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter:https://twitter.com/hdf5

    -- ___________________________________________________________________________
    Dr. Werner Benger Visualization Research
    Center for Computation & Technology at Louisiana State University (CCT/LSU)
    2019 Digital Media Center, Baton Rouge, Louisiana 70803
    Tel.:+1 225 578 4809 <tel:%28225%29%20578-4809> Fax.:+1 225 578-5362 <tel:%28225%29%20578-5362>

    _______________________________________________
    Hdf-forum is for HDF software users discussion.
    Hdf-forum@lists.hdfgroup.org <mailto:Hdf-forum@lists.hdfgroup.org>
    http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
    <http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org>
    Twitter: https://twitter.com/hdf5

--
Francesc Alted

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362