Re: [slurm-users] Slurm configuration

[Daniel Letai]

Hi. On 8/3/19 12:37 AM, Sistemas NLHPC wrote: Hi all, Currently we have two types of nodes, one with 192GB and another with 768GB of RAM, it is required that in nodes of 768 GB it is not allowed to execute tasks with less than 192GB, to avoid underutilization of resources. This, because we have nodes that can fulfill the condition of executing tasks with 192GB or less. Is it possible to use some slurm configuration to solve this problem? Easiest would be to use features/constraints. In slurm.conf add NodeName=DEFAULT RealMemory=196608 Features=192GB Weight=1 NodeName=... (list all nodes with 192GB) NodeName=DEFAULT RealMemory=786432 Features=768GB Weight=2 NodeName=... (list all nodes with 768GB) And to run jobs only on node with 192GB in sbatch do sbatch -C 192GB ... To run jobs on all nodes, simply don't add the constraint to the sbatch line, and due to lower weight jobs should prefer to start on the 192GB nodes. PD: All users can submit jobs on all nodes Thanks in advance Regards.