[slurm-users] Does Slurm have any equivalent to LSF elim for generating dynamic node resources

[Wagner, Marcus]

Hi Amir,

as far as I can tell, there is no way to create resources dynamically.

In general, a gres is a generic resource, e.g. tmp-Space, or whatever 
could be scheduled and must be restricted by a job.

A feature is more like a binary switch. You could for example set a 
feature "amd" on all amd nodes and "intel" on all intel nodes. For 
submission, one can then use --constraint=intel, such that the job will 
get scheduled onto a node, which has the "intel" feature.
But what you can do with features is, activate or deactivate features. 
There is a set of features, which you enter for each node in the 
slurm.conf. Here you could e.g. give EVERY node the "intel" and "amd" 
feature. You could then e.g. in a nodehealtcheck script deactivate the 
amd feature, if you are on an intel node.
One can see the difference between the AvailableFeatures ( which you 
entered in slurm.conf ) and the ActiveFeatures by executing "scontrol 
show node <nodename>" for the node.


Best
Marcus


Am 01.03.2023 um 22:04 schrieb Amir Ben Avi:
>
> Hi,
>
> I have looked on the Slurm documentation, but didn’t found any way to 
> crate resource dynamically ( in a script ) on the node level
>
> I also saw that Slurm have the feature + gres that can be declare on 
> the node, but those seems static resource tagging
>
> Will also be interesting to know what is the different between feature 
> and gres  in general ?
>
> Thanks for your help,
>
> Amir
>
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