Hi,
Lately a user of PyTables (a library based on HDF5) has shown interest
in implementing links in it. After a brief analysis, we realized that,
in order to avoid inconsistencies in PyTables' object tree cache
between several possible different (hard) reference to a dataset, we
would need an identifier that would be provided by HDF5 so that it
would be the same across all the links to the actual data in disk (kind
of a 'inode' in a filesystem).
Is there a way to get such a unique identifier?
Thanks!
···
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0,0< Francesc Altet http://www.carabos.com/
V V Cárabos Coop. V. Enjoy Data
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Hi Francesc,
Hi,
Lately a user of PyTables (a library based on HDF5) has shown interest
in implementing links in it. After a brief analysis, we realized that,
in order to avoid inconsistencies in PyTables' object tree cache
between several possible different (hard) reference to a dataset, we
would need an identifier that would be provided by HDF5 so that it
would be the same across all the links to the actual data in disk (kind
of a 'inode' in a filesystem).
Is there a way to get such a unique identifier?
Yes, you can use the 'addr' field from the H5O_info_t struct for this. Take a look at the new H5O* and H5L* routines in the 1.8.0 release for more goodies in this area.
Quincey
···
On Jan 31, 2008, at 2:02 PM, Francesc Altet wrote:
Thanks!
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0,0< Francesc Altet http://www.carabos.com/
V V Cárabos Coop. V. Enjoy Data
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Hi Francesc,
please look at H5Gget_objinfo in 1.6 and at H5Oget_info and H5Lget _info in 1.8
objno (addr) is what you probably looking for (address of the object in the file)
Elena
···
At 9:02 PM +0100 1/31/08, Francesc Altet wrote:
Hi,
Lately a user of PyTables (a library based on HDF5) has shown interest
in implementing links in it. After a brief analysis, we realized that,
in order to avoid inconsistencies in PyTables' object tree cache
between several possible different (hard) reference to a dataset, we
would need an identifier that would be provided by HDF5 so that it
would be the same across all the links to the actual data in disk (kind
of a 'inode' in a filesystem).
Is there a way to get such a unique identifier?
Thanks!
--
0,0< Francesc Altet http://www.carabos.com/
V V Cárabos Coop. V. Enjoy Data
"-"
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This mailing list is for HDF software users discussion.
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Elena Pourmal
The HDF Group
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Hi Elena, Quincey,
Yes, that was what we were looking for.
Thank you very much!
A Thursday 31 January 2008, Elena Pourmal escrigué:
···
Hi Francesc,
please look at H5Gget_objinfo in 1.6 and at H5Oget_info and H5Lget
_info in 1.8 objno (addr) is what you probably looking for
(address of the object in the file)
Elena
At 9:02 PM +0100 1/31/08, Francesc Altet wrote:
>Hi,
>
>Lately a user of PyTables (a library based on HDF5) has shown
> interest in implementing links in it. After a brief analysis, we
> realized that, in order to avoid inconsistencies in PyTables'
> object tree cache between several possible different (hard)
> reference to a dataset, we would need an identifier that would be
> provided by HDF5 so that it would be the same across all the links
> to the actual data in disk (kind of a 'inode' in a filesystem).
>
>Is there a way to get such a unique identifier?
>
>Thanks!
>
>--
>
>>0,0< Francesc Altet http://www.carabos.com/
>
>V V Cárabos Coop. V. Enjoy Data
> "-"
>
>--------------------------------------------------------------------
>-- This mailing list is for HDF software users discussion.
>To subscribe to this list, send a message to
> hdf-forum-subscribe@hdfgroup.org. To unsubscribe, send a message to
> hdf-forum-unsubscribe@hdfgroup.org.
--
0,0< Francesc Altet http://www.carabos.com/
V V Cárabos Coop. V. Enjoy Data
"-"
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