On 06/05/2014 02:25 PM, Mohamad Chaarawi wrote:
Hi Rene, Yes MPICH 3.1 does fix this outstanding issue. HDF5 however has not been updated to take advantage of this bug fix. We are aware of this, and do have a branch that gets rid of this limitation, but it didn't get enough attention/testing to make it into the 1.8.13 release.
I did the work to make ROMIO and MPICH "large datatype" compatible. Mohamad's branch was one of the good test cases to ensure it was in good shape, but the code could still benefit from some more testing.
if you've got an HDF5 or MPI-IO code that generates large I/O requests, I'd be happy to test it out, or if you test it out let me know if there are any problems.
==rob
Maybe 1.8.14 if all goes well, but I can't promise. Thanks for pointing out the FAQ that needs updating now. Thanks, Mohamad -----Original Message----- From: Hdf-forum [mailto:[email protected]] On Behalf Of Salmon, Rene Sent: Thursday, June 05, 2014 2:11 PM To: HDF Users Discussion List Subject: [Hdf-forum] 2gb limit ROMIO FAQ and mpich 3.1 fix? Hi, Regarding this 2GB limitation in ROMIO/pHDF5 for which there is an FAQ. http://www.hdfgroup.org/hdf5-quest.html#p2gb In mpich 3.1 There where some patches that seem to hint this Romio limitation might be fixed. Any comets or updates on this and HDF5 Thanks Rene _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5 _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
-- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
