Parallel HDF5 write with irregular size in one dimension

HDF5 Library
10 
     	 tobias.meisel Tobias Meisel

April 19
My Setup is:

OpenMPI (OpenRTE) 4.0.5
HDF5 1.12.0
Darshan 3.2.1
I get this error: output.txt (3.2 KB)

I have not contacted the Darshan team yet. I will post this question
to the Darshan users mailing list and give a link here as soon as
possible.

I don’t know why I cannot log into the HDF5 discourse right now.

I’ll repeat what I said on the Darshan list: we knew of one problem
with Darsan and hyperslab selections, but we did not know this would
cause a “divide by zero” problem with OpenMPI

Workarounds, keeping Darshan in the picture:

  • enable the ROMIO MCA for OpenMPI:
    mpirun --mca io romio314 or mpirun -mca io romio321

  • Use MPICH instead of OpenMPI

We’re aware of the hyperslab selection error and working on it. Did
not know about the bad interaction with OpenMPI-IO in that case,
though, so thanks for the bug report

1 Like