[alcf-discuss] Parallel hdf5 I/O of strided data

[Rob Latham]

On Wed, May 06, 2009 at 09:47:31AM -0700, John R. Cary wrote:
> Is anyone else writing out strided data
> using parallel HDF5 on Intrepid?  We had this working
> at one time, before the driver change, but
> since then we also changed how we do I/O.
> Now we get garbage out.

Hi John.  You're going to have to be a lot more specific. 
- Which file system are you writing to?
- what, if any, HDF5 property list tunables are you setting
- what version of HDF5 are you using?

As far as I know, it's entirely possible and not uncommon to get
correct strided parallel HDF5 writes.  But, the FLASH gang is getting
corrupted data when setting certain parameters.  I'd like to hear if
you're doing what they are doing, or if you've found something new.

thanks
==rob

-- 
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA