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Simple MPI submit Simple MPI submit

Simple MPI submit

To submit an MPI job on the cluster, the user must secure-copy the .mpi executable over the cluster.

In the following example, we prepared a C script that calculates the value of pi and we compiled it with:

       module load openmpi

       mpicc example.c -o picalc.mpi

#!/bin/bash

#

#SBATCH --job-name=test_mpi_picalc

#SBATCH --output=res_picalc.txt

#SBATCH --nodelist=... #or use --nodes=...

#SBATCH --ntasks=8

#SBATCH --time=5:00

#SBATCH --mem-per-cpu=1000

srun picalc.mpi

If the .mpi file is not available on desired compute nodes, which will be the most frequent scenario if you save your files in a custom path, computation is going to fail. That happens because Slurm does not take autonomously the responsibility of transfering transferring files over compute nodes.

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