@@ -45,7 +45,32 @@ This is 3, I got 4, I'm so talented
```
## Script explanation
We are now describing the Slurm script [run.slurm](https://gitlab.oca.eu/DSI/HPC/-/blob/master/SLURM/MPI/build.sh). Note that we will run 2 task per node to illustrate the fact that the job will use more than one node, although this toy example would be happy with one job per core.
```
#!/bin/bash
#SBATCH --job-name=Dice # job name
#SBATCH --ntasks=4 # Total number of MPI processes, could be deduced
#SBATCH --ntasks-per-node=2 # Total number of MPI processes per node
#SBATCH --time=00:10:00 # Maximum compute time (HH:MM:SS)
#SBATCH --output=log-dice-%j.out # Ouput file (%j is the job's id)
#SBATCH --error=log-dice-%j.err # Error file
# Go to the submit dir
cd${SLURM_SUBMIT_DIR}
# Cleanup the environment that could be inherited
module purge
# Load the needed modules, depends on your application
module load intel-gnu8-runtime/19.1.2.254
module load intelpython3 impi
module load boost
# Be verbose
set-x
# Run the code, one could also use mpiexec or mpirun
srun --mpi=pmi2 ./dice
```
[^1]:which has an impact in term of Slurm integration.
