[slurm-users] New "NOT-state" selection of the sinfo command in Slurm 25.05

[Ole Holm Nielsen via slurm-users]

We just upgraded Slurm to 25.05.3, and I would like to highlight a new
functionality of the "sinfo -t <state>" command in 25.05:

> The state can be prefixed with '~' which will invert the result of match.

We find this "NOT-state" selection useful together with Slurm power saving
[1] where any idle nodes may be powered off to save electrical power or
cloud costs.

For example, the ClusterShell [2] clush command can now skip connections
to the powered down nodes like in this example:

$ clush -bw@slurmstate:~POWERED_DOWN uname -r

You can even configure ClusterShell so that "clush -a" includes all nodes
which are *not* powered down. The details are described in the Wiki page [3].

Best regards,
Ole

[1] https://slurm.schedmd.com/power_save.html
[2] https://clustershell.readthedocs.io/en/latest/intro.html
[3]
https://wiki.fysik.dtu.dk/Niflheim_system/Slurm_operations/#skipping-powered-down-nodes

--
Ole Holm Nielsen
PhD, Senior HPC Officer
Department of Physics, Technical University of Denmark

--
slurm-users mailing list -- slurm...@lists.schedmd.com
To unsubscribe send an email to slurm-us...@lists.schedmd.com