[slurm-users] Allowing scheduling on a node for specific users

[Carsten Beyer]

Hi Peter,

you could create a reservation with scontrol and put only the root user 
or any other testuser(s) in the 'users' section, e.g.

scontrol create reservation=test nodes=<nodename> starttime=<starttime> 
duration=<how-long> users=root

Then you need to put the reservation name to your sbatch definition or 
commandline for your testjob.

Cheers,
Carsten

Am 29.07.2021 um 11:59 schrieb Peter Schmidt:
> Hello everyone,
> I have a Slurm GPU cluster that I'm administrating and from time to 
> time I need to run test jobs. The issue is that my users allocate all 
> GPUs as soon as they become available, which makes testing for me 
> impossible.
> I could drain a node and wait until all jobs are finished, but as soon 
> as I enable it again to run my test job the queued user jobs will be 
> scheduled for that node. Is there a way to drain a node and still be 
> able to schedule jobs for select users (e.g. root)? I currently don't 
> have any kind of priority system in my cluster.
> Thank you in advance and best regards

-- 
Carsten Beyer
Abteilung Systeme

Deutsches Klimarechenzentrum GmbH (DKRZ)
Bundesstraße 45a * D-20146 Hamburg * Germany

Phone:  +49 40 460094-221
Fax:    +49 40 460094-270
Email:  beyer at dkrz.de
URL:    http://www.dkrz.de

Geschäftsführer: Prof. Dr. Thomas Ludwig
Sitz der Gesellschaft: Hamburg
Amtsgericht Hamburg HRB 39784


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