Noam,

Thanks for the suggestion but no luck:

sbatch -p multinode -n 80 --ntasks-per-core=1 --wrap="..." sbatch: error: Batch job submission failed: Node count specification invalid

sbatch -p multinode -n 2 -c 40 --ntasks-per-core=1 --wrap="..." sbatch: error: Batch job submission failed: Node count specification invalid

sbatch -p multinode -N 2 -n 80 --ntasks-per-core=1 --wrap="..." Submitted batch job

I guess that the MinNodes=2 in the partition def is now being enforced somewhat more strictly, or earlier in the submission process, before it can be determined that the request will satisfy the constraint.

Regards, George

-- George Leaver Research Infrastructure, IT Services, University of Manchester http://ri.itservices.manchester.ac.uk | @UoM_eResearch

________________________________________ From: Bernstein, Noam CIV USN NRL WASHINGTON DC (USA) noam.bernstein.civ@us.navy.mil Sent: 09 June 2024 19:33 To: George Leaver; slurm-users@lists.schedmd.com Subject: Re: sbatch: Node count specification invalid - when only specifying --ntasks

It would be a shame to lose this capability. Have you tried adding `--ntasks-per-core` explicitly (but not number of nodes)?

Noam