In the absence of other directives, slurm tries to use the minimum number of nodes.
Instead of -n16, try -N 2 That tells slurm to use two nodes. Here's a demo case srun -l -N2 --tasks-per-node=2 hostname 1: trek0 0: trek0 2: trek1 3: trek1 -----Original Message----- From: Magnus Jonsson [mailto:[email protected]] Sent: Wednesday, February 19, 2014 1:28 AM To: slurm-dev Subject: [slurm-dev] --exclusive together with --ntasks-per-node not working as expected. Hi! We have a user that submitted a job that did not start as expected. He was using --exclusive together with --ntasks-per-node but ended up with all task on one node anyway. ----8<---- #SBATCH -n 16 #SBATCH --exclusive #SBATCH --ntasks-per-node=8 ----8<---- See the attached files for more information about how the job was submitted. We are currently running version 2.6.3. Best regards, Magnus -- Magnus Jonsson, Developer, HPC2N, Umeå Universitet
