Merge branch 'main' into sa-ping-pong

01-MSA-hello-world/Makefile

+SYS:=none
+_SYS=$(addprefix .,$(SYS))
+MPICC=mpicc
+
+EXECS=mpi_hello_world$(_SYS).out
+
+.PHONY: all clean
+all: ${EXECS}
+
+mpi_hello_world$(_SYS).out: mpi_hello_world.c
+	${MPICC} -o $@ $<
+
+clean:
+	rm ${EXECS} *.out || true

01-MSA-hello-world/README.md

+# MSA Hello World
+
+In this simple example, the Slurm heterogeneous job functionality is used to launch a job between JUWELS Cluster and Booster.
+
+Execute the following on JUWELS Booster
+
+```bash
+bash compile.sh
+```
+
+Execute the following on JUWELS Cluster
+
+```bash
+bash compile.sh
+sbatch job_msa_juwels.sh
+```
+
+Monitor your job with `squeue --me`. When it ran through successfully, have a look at the output in `slurm-out.N`, with `N` being your job number.
\ No newline at end of file

01-MSA-hello-world/compile.sh

+if [[ "$SYSTEMNAME" == "juwelsbooster" ]]; then
+	echo "Building for $SYSTEMNAME"
+	ml GCC ParaStationMPI
+	make SYS=$SYSTEMNAME
+elif [[ "$SYSTEMNAME" == "juwels" ]]; then
+	echo "Building for $SYSTEMNAME"
+	ml GCC ParaStationMPI
+	make SYS=$SYSTEMNAME
+else
+	echo "The system $SYSTEMNAME is not supported!"
+	echo "Please load a capable MPI and compile the executables on each system with"
+	echo "make SYS=PARTIONNAME"
+fi
\ No newline at end of file

01-MSA-hello-world/job_msa_jureca.sh

+#!/bin/bash -x
+#SBATCH --account=exalab
+#SBATCH --nodes=1
+#SBATCH --ntasks-per-node=1
+#SBATCH --output=slurm-out.%j
+#SBATCH --error=slurm-err.%j
+#SBATCH --time=00:15:00
+#SBATCH --partition=dc-cpu-devel
+#SBATCH hetjob
+#SBATCH --nodes=1
+#SBATCH --ntasks-per-node=1
+#SBATCH --partition=dc-gpu-devel
+
+srun xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world.jureca.out : xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world.jureca.out

01-MSA-hello-world/job_msa_juwels.sh

+#!/bin/bash -x
+#SBATCH --account=training2317
+#SBATCH --nodes=1
+#SBATCH --ntasks-per-node=1
+#SBATCH --output=slurm-out.%j
+#SBATCH --error=slurm-err.%j
+#SBATCH --time=00:15:00
+#SBATCH --partition=devel
+#SBATCH hetjob
+#SBATCH --nodes=1
+#SBATCH --ntasks-per-node=1
+#SBATCH --partition=develbooster
+
+srun xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world.juwels.out : xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world.juwelsbooster.out

01-MSA-hello-world/mpi_hello_world.c

+#include <mpi.h>
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+    // Initialize the MPI environment
+    MPI_Init(NULL, NULL);
+
+    // Get the number of processes
+    int world_size;
+    MPI_Comm_size(MPI_COMM_WORLD, &world_size);
+
+    // Get the rank of the process
+    int world_rank;
+    MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
+
+    // Get the name of the processor, which is the hostname
+    char processor_name[MPI_MAX_PROCESSOR_NAME];
+    int name_len;
+    MPI_Get_processor_name(processor_name, &name_len);
+
+    // Print off a hello world message
+    printf("Hello world from processor %s, rank %d out of %d processors\n",
+           processor_name, world_rank, world_size);
+
+    // Finalize the MPI environment.
+    MPI_Finalize();
+}