[hdf-forum] provenance

[Werner Benger]

Would we like to have shared UUID's, such as to specify that "this set of  
HDF5
files belongs together"? This could be very useful for files produced  
during
some multiprocessor simulation.

	Werner


On Tue, 24 Mar 2009 15:41:27 -0500, Dimitris Servis <servisster at gmail.com>  
wrote:

> Hi Quincey
>
> if it would be possible to copy it, I would also be interested. My use  
> case
> is this: when deleting large objects from the file, I copy all objects  
> to a
> new file and delete the old one. But some applications may depend on the
> time stamp of the file and therefore I would have to modify the time  
> stamp
> of the new file using OS functions. Any unique ID would solve this.
>
> thanks!
>
> -- dimitros
>
> 2009/3/24 Quincey Koziol <koziol at hdfgroup.org>
>
>> Hi Matthew,
>>
>> On Mar 24, 2009, at 1:32 PM, Matthew Dougherty wrote:
>>
>>  Is there a unique identifier internally within an HDF file when it is
>>> created?
>>>
>>> Something that would distinguish it from another HDF file created two
>>> seconds later, and cannot be disabled or modified.
>>> Do not want to use the operating system/file system creation date or
>>> parameters in fstat, prefer a HDF api.
>>>
>>
>>        That's a good idea...  Would a UUID fit what you are thinking?  (
>> http://en.wikipedia.org/wiki/Uuid)
>>
>>                Quincey
>>
>>  On Mar 24, 2009, at 5:11 AM, Quincey Koziol wrote:
>>>
>>>>
>>>>        BTW, tracking these time for an object can be disabled by  
>>>> calling
>>>> H5Pset_obj_track_times() with the 'track_times' parameter set to  
>>>> FALSE.
>>>>
>>>
>>>
>>>
>>



-- 
___________________________________________________________________________
Dr. Werner Benger <werner at cct.lsu.edu>               Visualization Research
Laboratory for Creative Arts and Technology (LCAT)
Center for Computation & Technology at Louisiana State University (CCT/LSU)
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Tel.: +1 225 578 4809                        Fax.: +1 225 578-5362