Hi Quincey,

Quick question...I understand how libver bounds can improve a "data producer" 
in that it effects both memory and file data structures used.

But, how does it effect a "data consumer", especially reading an "old" file 
using "old structures"? Is there a conversion step during the read to new 
memory data structures?

Mark


"Hdf-forum on behalf of Quincey Koziol" wrote:

Hi Deepak,
Can you try using the “latest” version of the format 
(https://support.hdfgroup.org/HDF5/doc/RM/RM_H5P.html#Property-SetLibverBounds 
) and see if that helps?

Quincey

On Jul 13, 2017, at 11:14 AM, Deepak 8 Kumar 
<kumar_deepa...@cat.com<mailto:kumar_deepa...@cat.com>> wrote:

Hello!

I have a HDF5 based application to read the hdf5 file which has almost 3200 
groups and 56000 attributes. The application is using the standard hdf5 api and 
it took almost 11 minutes to read only the groups and attributes. I used 
StopWatch and observed that H5Aopen_name() is taking almost 97 percent of the 
total time. I am using HDF 1.10.1 Windows10 x64.

My question is that is this the expected behavior here with H5Aopen_name()  or 
I am not  reading it properly?
What approach we should take in this kind of file with large number of 
attributes?
Any insight is greatly appreciated.

Thanks,
Deepak Kumar_______________________________________________
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