[slurm-users] Re: [EXTERN] Re: scheduling according time requirements

[Dietmar Rieder via slurm-users]

Hi Loris,

On 4/30/24 2:53 PM, Loris Bennett via slurm-users wrote:

Hi Dietmar,

Dietmar Rieder via slurm-users <slurm-users@lists.schedmd.com> writes:

Hi,

is it possible to have slurm scheduling jobs automatical according to
the "-t" time requirements to a fitting partition?

e.g. 3 partitions

PartitionName=standard Nodes=c-[01-10] Default=YES MaxTime=04:00:00
DefaultTime=00:10:00 State=UP OverSubscribe=NO
PartitionName=medium Nodes=c-[04-08] Default=NO MaxTime=24:00:00
DefaultTime=04:00:00 State=UP OverSubscribe=NO
PartitionName=long Nodes=c-[09-10] Default=NO MaxTime=336:00:00
DefaultTime=24:00:00 State=UP OverSubscribe=NO


So in the standard partition which is the default we have all nodes
and a max time of 4h, in the medium partition we have 4 nodes with a
max time of 24h and in the long partition we have 2 nodes with a max
time of 336h.

I was hoping that if I submit a job with -t 01:00:00 it can be run on
any node (standard partition), whereas when specifying -t 05:00:00 or
-t 48:00:00 the job will run on the nodes of the medium or long
partition respectively.

However, my job will not get scheduled at all when -t is greater than
01:00:00

i.e.

]$ srun --cpus-per-task 1 -t 01:00:01  --pty bash
srun: Requested partition configuration not available now
srun: job 42095 queued and waiting for resources

it will wait forever because the standard partition is selected, I was
thinking that slurm would automatically switch to the medium
partition.

Do I misunderstand something there? Or can this be somehow configured.

You can specify multiple partitions, e.g.


Notice that rather than using 'srun ... --pty bash', as far as I
understand, the preferred method is to use 'salloc' as above, and to use
'srun' for starting MPI processes.

$ salloc --cpus-per-task=1 --time=01:00:01 --partition=standard,medium,long

Dietmar

Thanks for the hint. This works nicely, but it would be nice that I would not need to specify the partition at all. Any thoughts?

OpenPGP_signature.asc
Description: OpenPGP digital signature

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