[slurm-users] ntasks-per-node for mpirun

Mahmood Naderan mahmood.nt at gmail.com
Mon Sep 28 20:04:23 UTC 2020

With "cpu=48,mem=40G" limits and the following script

#SBATCH --job-name=gr
#SBATCH --output=my_gr.log
#SBATCH --partition=SEA
#SBATCH --account=fish
#SBATCH --mem=6GB
#SBATCH --nodes=4
#SBATCH --ntasks-per-node=20
mpirun -np $SLURM_NTASKS /share/apps/gromacs-2019.6/single/bin/gmx_mpi
mdrun -v -ntomp 1 -deffnm nvt

I see that job goes to the pending state with the AssocGrpCpuLimit reason.
I expected to have 4 nodes each running 5 mpi processes.
Isn't that? So why has the CPU limit been exceeded?

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