H5O_info_t description

Hi all

does anyone know what "modification time" and "change time" stand for in *
H5O_info_t?

http://www.hdfgroup.org/HDF5/doc/RM/RM_H5O.html#Object-GetInfo

Thanks!

Dimitris

···

*

Hi Dimitris,

···

On Nov 11, 2011, at 4:56 AM, Dimitris Servis wrote:

Hi all

does anyone know what "modification time" and "change time" stand for in H5O_info_t?

http://www.hdfgroup.org/HDF5/doc/RM/RM_H5O.html#Object-GetInfo

  Sorry for the terse information, here's a more detailed explanation:

- btime - Birth Time - When the object was created

- ctime - Change Time - The last time metadata for the object was changed

- mtime - Modification Time - The last time raw data for the object was changed

- atime - Access Time - The last time the object was accessed (read or written)

  Quincey

Hi Quincey

thanks for clarifying this. Unfortunately it seems that for me only ctime
is non-zero... I will take a look into it.

Thanks a lot!

-- dimitris

···

2011/11/11 Quincey Koziol <koziol@hdfgroup.org>

Hi Dimitris,

On Nov 11, 2011, at 4:56 AM, Dimitris Servis wrote:

Hi all

does anyone know what "modification time" and "change time" stand for in *
H5O_info_t?

http://www.hdfgroup.org/HDF5/doc/RM/RM_H5O.html#Object-GetInfo
*

Sorry for the terse information, here's a more detailed explanation:

- btime - Birth Time - When the object was created

- ctime - Change Time - The last time metadata for the object was changed

- mtime - Modification Time - The last time raw data for the object was
changed

- atime - Access Time - The last time the object was accessed (read or
written)

Quincey

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

Hi Dimitris,

Hi Quincey

thanks for clarifying this. Unfortunately it seems that for me only ctime is non-zero... I will take a look into it.

  Ah, the other fields aren't updated by the library yet. :slight_smile:

    Quincey

···

On Nov 11, 2011, at 10:27 AM, Dimitris Servis wrote:

Thanks a lot!

-- dimitris

2011/11/11 Quincey Koziol <koziol@hdfgroup.org>
Hi Dimitris,

On Nov 11, 2011, at 4:56 AM, Dimitris Servis wrote:

Hi all

does anyone know what "modification time" and "change time" stand for in H5O_info_t?

http://www.hdfgroup.org/HDF5/doc/RM/RM_H5O.html#Object-GetInfo

  Sorry for the terse information, here's a more detailed explanation:

- btime - Birth Time - When the object was created

- ctime - Change Time - The last time metadata for the object was changed

- mtime - Modification Time - The last time raw data for the object was changed

- atime - Access Time - The last time the object was accessed (read or written)

  Quincey

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

Hi Quincey,

  how would "access time" work, is it supposed to modify a read-only-openes file?

It sounds like a cool feature, but I'd be wondering how deal with such constraints like even read-only filesystems.

       Werner

···

On Fri, 11 Nov 2011 10:27:50 -0600, Dimitris Servis <servisster@gmail.com> wrote:

Hi Quincey

thanks for clarifying this. Unfortunately it seems that for me only ctime is non-zero... I will take a look into it.

Thanks a lot!

-- dimitris

2011/11/11 Quincey Koziol <koziol@hdfgroup.org>

Hi Dimitris,

On Nov 11, 2011, at 4:56 AM, Dimitris Servis wrote:

Hi all

does anyone know what "modification time" and "change time" stand for in H5O_info_t?

http://www.hdfgroup.org/HDF5/doc/RM/RM_H5O.html#Object-GetInfo

  Sorry for the terse information, here's a more detailed explanation:

- btime - Birth Time - When the object was created

- ctime - Change Time - The last time metadata for the object was changed

- mtime - Modification Time - The last time raw data for the object was changed

- atime - Access Time - The last time the object was accessed (read or written)

  Quincey

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Laboratory for Creative Arts and Technology (LCAT)
Center for Computation & Technology at Louisiana State University (CCT/LSU)
211 Johnston Hall, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362

Hi Werner,

Hi Quincey,

how would "access time" work, is it supposed to modify a read-only-openes file?

It sounds like a cool feature, but I'd be wondering how deal with such constraints like even read-only filesystems.

  If a file is opened read-only, none of these times will be changed.

  Quincey

···

On Nov 11, 2011, at 11:20 AM, Werner Benger wrote:

      Werner

On Fri, 11 Nov 2011 10:27:50 -0600, Dimitris Servis <servisster@gmail.com> wrote:

Hi Quincey

thanks for clarifying this. Unfortunately it seems that for me only ctime is non-zero... I will take a look into it.

Thanks a lot!

-- dimitris

2011/11/11 Quincey Koziol <koziol@hdfgroup.org>
Hi Dimitris,

On Nov 11, 2011, at 4:56 AM, Dimitris Servis wrote:

Hi all

does anyone know what "modification time" and "change time" stand for in H5O_info_t?

http://www.hdfgroup.org/HDF5/doc/RM/RM_H5O.html#Object-GetInfo

  Sorry for the terse information, here's a more detailed explanation:

- btime - Birth Time - When the object was created

- ctime - Change Time - The last time metadata for the object was changed

- mtime - Modification Time - The last time raw data for the object was changed

- atime - Access Time - The last time the object was accessed (read or written)

  Quincey

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Laboratory for Creative Arts and Technology (LCAT)
Center for Computation & Technology at Louisiana State University (CCT/LSU)
211 Johnston Hall, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362
_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org