[slurm-users] How to request ONLY one CPU instead of one socket or one node?

Marcus Wagner wagner at itc.rwth-aachen.de
Wed Feb 13 04:57:20 UTC 2019

Hi Leon,

depends on how the admins configured slurm. If they set select/linear, 
you have no chance to get just a core, as slurm will schedule only 
complete nodes.

Nonetheless, you omitted to tell slurm, how much memory you need (at 
least there is nothing in your script). Slurm will then also schedule a 
complete node.
Please try something like --mem=1024. This will restrict your job to 1 
GB memory. If you need more, you'll have to specify more.


On 2/13/19 5:19 AM, Wang, Liaoyuan wrote:
> Dear there,
> I wrote an analytic program to analyze my data. The analysis costs 
> around twenty days to analyze all data for one species. When I submit 
> my job to the cluster, it always request one node instead of one CPU. 
> I am wondering how I can ONLY request one CPU using “sbatch” command? 
> Below is my batch file. Any comments and help would be highly 
> appreciated.
> Appreciatively,
> Leon
> ================================================
> #!/bin/sh
> #SBATCH --ntasks=1
> #SBATCH --cpus-per-task=1
> #SBATCH -t 45-00:00:00
> #SBATCH -J 9625%j
> #SBATCH -o 9625.out
> #SBATCH -e 9625.err
> /home/scripts/wcnqn.auto.pl
> ===========================================
> Where wcnqn.auto.pl is my program. 9625 denotes the species number.

Marcus Wagner, Dipl.-Inf.

IT Center
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80-24383
Fax: +49 241 80-624383
wagner at itc.rwth-aachen.de

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