[slurm-users] Conflicting --nodes and --nodelist

[Marcus Boden]

Hi,

as per 
https://slurm.schedmd.com/archive/slurm-18.08.5/sbatch.html#OPT_nodelist

> Request a specific list of hosts. The job will contain *all* of these hosts and possibly additional hosts as needed to satisfy resource requirements.

So at least in the sbatch manpage it explicitly states that all nodes 
are in the allocation. This is the same in the latest version, so I 
guess there are not many changes to be expected.

The only way I currently see to do that from user side is to exclude all 
the other nodes with -x/--exclude. If this is for testing and more from 
an admin side, you could also create a reservation or temporary partition.

Best,
Marcus

On 01.06.21 13:15, Diego Zuccato wrote:
> Hello all.
> 
> I just found that if an user tries to specify a nodelist (say including 
> 2 nodes) and --nodes=1, the job gets rejected with
> sbatch: error: invalid number of nodes (-N 2-1)
> The expected behaviour is that slurm schedules the job on the first node 
> available from the list.
> I've found conflicting info about the issue. Is it version-dependant?
> If so, we're currently using 18.08.5-2 (from Debian stable). Should we 
> expect changes when Debian will ship a newer version? Is it possible to 
> have the expected behaviour?
> 
> Tks.
> 

-- 
Marcus Vincent Boden, M.Sc.
Arbeitsgruppe eScience, HPC-Team
Tel.:   +49 (0)551 201-2191, E-Mail: mboden at gwdg.de
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