Hi Mark,
Thanks so much for this - yes, applying that pull request against ompi
4.0.5 allows hdf5 1.10.7's parallel tests to pass on our Lustre
filesystem.
I'll certainly be applying it on our local clusters!
Best wishes,
Mark
On Tue, 1 Dec 2020, Mark Allen via users wrote:
At least for the topic of why romio fails with HDF5, I believe this is
the fix we need (has to do with how romio processes the MPI datatypes in
its flatten routine). I made a different fix a long time ago in SMPI
for that, then somewhat more recently it was re-broke it and I had to
re-fix it. So the below takes a little more aggressive approach, not
totally redesigning the flatten function, but taking over how the array
size counter is handled. https://github.com/open-mpi/ompi/pull/3975
Mark Allen
