[slurm-users] Alocating a subset cores to each job

[Nadav Toledo]

Hello everyone, Sorry for might be a trivial question for most of you. I am trying to understand cpu allocation in slurm. The goal is to launch a batch job on one node. while the batch itself will run several jobs in parallel each allocated a subset of the cpus given to the batch. We've tried the following: #!/bin/bash #SBATCH --nodelist=server5 #SBATCH --sockets-per-node=2 #SBATCH --cores-per-socket=10 nproc & srun  --ntasks=1 --cpus-per-task=2  echo "nproc is `nproc` " & srun  --ntasks=1 --cpus-per-task=4  echo "nproc2 is `nproc` " & wait result is: 20 nproc is 20 nproc2 is 20 (lines order might be different, it doen't matter at this point) desired output is: 20 nproc is 2 nproc2 is 4 (lines order might be different, it doen't matter at this point) So the quetsion is: How can one send a few jobs running in parallel with different cpus allocation on the same node? Thanks in advance, Nadav