Environment variables for different MPI flavors

Intel-MPI (impi)
export I_MPI_PMI_LIBRARY=/hpc/gpfs2/sw/pmi2/current/lib/libpmi2.so
export I_MPI_FABRICS=shm:ofi
export FI_PROVIDER=mlx
export SLURM_MPI_TYPE=pmi2

# or more simply:

module load impi-envvars
OpenMP (ompi)
export SLURM_MPI_TYPE=pmix_v4 # or pmix_v3 or pmix_v2 depending on what your self-compiled OpenMPI version supports

For modules provided by the HPC-Team these variables are most lilely already set in the corresponding module definition.

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