[slurm-users] slurm node weights

[Ole Holm Nielsen]

You should be able to assign node weights to accommodate your 
prioritization wishes.  I've summarized this setting in my Slurm Wiki page:
https://wiki.fysik.dtu.dk/niflheim/Slurm_configuration#node-weight

I hope this helps.

/Ole

On 9/5/19 5:48 PM, Douglas Duckworth wrote:
> Hello
> 
> We added some newer Epyc nodes, with NVMe scratch, to our cluster and so 
> want jobs to run on these over others.  So we added "Weight=100" /*to 
> the older nodes*/ and left the new ones blank.  So indeed, ceteris 
> paribus, srun reveals that the faster nodes will accept jobs over older 
> ones.
> 
> We have the desired outcome though I am a bit confused by two statements 
> in the manpage <https://slurm.schedmd.com/slurm.conf.html> that seem to 
> be contradictory:
> 
> "All things being equal, jobs will be allocated the nodes with the 
> lowest weight which satisfies their requirements."
> 
> "...larger weights should be assigned to nodes with more processors, 
> memory, disk space, higher processor speed, etc."
> 
> 100 is larger than 1 and we do see jobs preferring the new nodes which 
> have the default weight of 1.  Yet we're also told to assign larger 
> weights to faster nodes?