Hi all, I am having the weirdest error ever. I am pretty sure this is a bug. I have reproduced the error in latest slurm commit (slurm 17.02.0-0pre2, commit 406d3fe429ef6b694f30e19f69acf989e65d7509 ) and in slurm 16.05.5 branch. It does NOT happen in slurm 15.08.12 .
My cluster is composed by 8 nodes, each with 2 sockets, each with 8 cores. Slurm.conf content is SchedulerType=sched/backfill SchedulerPort=7321 SelectType=select/linear #DEDICATED NODES NodeName=acme[11-14,21-24] CPUs=16 Sockets=2 CoresPerSocket=8 ThreadsPerCore=1 State=UNKNOWN I am running a simple hello World parallel code. It is submitted as "sbatch --ntasks=X --tasks-per-node=Y myScript.sh ". The problem is that, depending on the values of X and Y, Slurm performs a wrong opperation and returns an error. " sbatch --ntasks=8 --tasks-per-node=2 myScript.sh srun: Warning: can't honor --ntasks-per-node set to 2 which doesn't match the requested tasks 4 with the number of requested nodes 4. Ignoring --ntasks-per-node. " Note that I did not request 4 but 8 tasks, and I did not request any number of nodes. Same happens with " sbatch --ntasks=16 --tasks-per-node=2 myScript.sh srun: Warning: can't honor --ntasks-per-node set to 2 which doesn't match the requested tasks 8 with the number of requested nodes 8. Ignoring --ntasks-per-node. " and " sbatch --ntasks=32 --tasks-per-node=4 myScript.sh srun: Warning: can't honor --ntasks-per-node set to 4 which doesn't match the requested tasks 8 with the number of requested nodes 8. Ignoring --ntasks-per-node. " All the rest of configurations work correctly and do not return any error. In particular, I have tried the following combinations with no problem: (ntasks, tasks-per-node) (1,1) (2,1), (2,2) (4,1), (4,2), (4,4) (8,1), (4,4), (8,8) (16,4), (16,8), (16,16) (32,8), (32,16) (64,8), (64, 16) (128, 16) As said, this does not happen when executing the very same commands and scripts with slurm 15.08.12. So, have you had any similar experiences? Is this a bug, a desired behaviour, or am I doing something wrong? Thanks for your help. Best regards, Manuel
