Running-the-jobs/MPI-jobs.md

-:construction_site: under construction, please consult [this](https://crimson.oca.eu/fr/acces-fonctionnement/gestion-des-jobs/1340-exemples-de-scripts) in the meantime
-
 [**M**essage **P**assing **I**nterface](https://www.mpi-forum.org/) (MPI) can be used to distribute parallel aplication on more than one node. We support the Intel implementation.[^1]
 
+## Get the example
+```
+14:56:53 [alainm@pollux view]# git clone https://gitlab.oca.eu/DSI/HPC.git
+Cloning into 'HPC'...
+...
+Resolving deltas: 100% (39/39), done.
+14:58:03 [alainm@pollux view]# cd HPC/SLURM/MPI/
+14:58:10 [alainm@pollux MPI]# ls
+build.sh  CMakeLists.txt  mpi.cpp  run.slurm
+14:58:12 [alainm@pollux MPI]# 
+```
+
+## Build
+```
+15:06:26 [alainm@pollux MPI]# ./build.sh 
+~/view/HPC/SLURM/MPI/rel ~/view/HPC/SLURM/MPI
+...
+Scanning dependencies of target dice
+[ 50%] Building CXX object CMakeFiles/dice.dir/mpi.cpp.o
+[100%] Linking CXX executable dice
+[100%] Built target dice
+~/view/HPC/SLURM/MPI
+‘rel/dice’ -> ‘./dice’
+15:07:12 [alainm@pollux MPI]# 
+```
+## Run
+```
+15:07:12 [alainm@pollux MPI]# sbatch --partition=x40 --nodes=2 ./run.slurm 
+Submitted batch job 33544995
+15:08:47 [alainm@pollux MPI]# more log-dice-33544995.out 
+Hi, this is processs 0 from node x001.cluster.local
+...
+Hi, this is processs 3 from node x002.cluster.local
+..
+Let's play dices.
+Who's de best ?
+This is 0, I got 2, I'm such a looser...
+...
+This is 3, I got 4, I'm so talented
+15:08:54 [alainm@pollux MPI]# 
+```
+## Script explanation
+We are now describing the Slurm script [run.slurm](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.
+```
 
-[^1]: which has an impact in term of Slurm integration.
+```
+[^1]: which has an impact in term of Slurm integration.
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