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> cat submit.sh
#!/bin/bash

#SBATCH --partition=anagpu
#SBATCH --ntasks=4
#SBATCH --ntasks-per-node=2
#SBATCH --output=%j.log

# "-u" flushes print statements which can otherwise be hidden if mpi hangs
# "-m mpi4py.run" allows mpi to exit if one rank has an exception
mpirun python -m mpi4py.run -u /reg/g/psdm/tutorials/examplePython/mpiDataSource.py