[slurm-users] Not able to allocate all 24 ntasks-per-node; slurm.conf appears correct

[Anne M. Hammond]

We are just getting started with slurm here.  We have

slurm 18.08.6-2

/etc/slurm/slurm.conf:

NodeName=fl[01-04] CPUs=24 RealMemory=40000 Sockets=2 CoresPerSocket=6 ThreadsPerCore=2 State=UNKNOWN 


Cannot allocate ntasks-per-node:

[hammond at hydrogen VSim-9.0]$ srun -N 1 --ntasks-per-node=24 --pty bash
srun: error: CPU count per node can not be satisfied
srun: error: Unable to allocate resources: Requested node configuration is not available
srun: Force Terminated job 46

Can allocate 12 ntasks-per-node:
[hammond at hydrogen VSim-9.0]$ srun -N 1 --ntasks-per-node=12 --pty bash
[hammond at fl01 tmp]$ 

Thank you for any pointers.

Anne