Reply To: SLURM script OpenLB
For the current release we recommend usage of the plain MPI-only mode. Hybrid mode will yield an advantage for the upcoming release (due to SIMD support and other architectural improvements).
The specifics of a SLURM script are quite cluster-dependent. For example, here is a script for MPI-only execution on the HoreKa supercomputer at KIT (MPI-only on 10 nodes, compiled using the Intel C++ compiler and MPI libraries):
#!/bin/bash #SBATCH --partition="cpuonly" #SBATCH --nodes=10 #SBATCH --ntasks=760 #SBATCH --time=00:30:00 module load mpi/impi/2021.4.0 export OMP_NUM_THREADS=1 mpiexec.hydra ./yourProgram
The documentation of your specific cluster likely includes at least an example script for a plain MPI program. This should also work for OpenLB MPI-only mode.