[slurm-users] Slurm prolog export variable

Yap, Mike M.Yap at massey.ac.nz
Tue Mar 23 21:15:54 UTC 2021

Hi Jürgen

Thanks for the help 😊 TaskProlog did get the job done


-----Original Message-----
From: slurm-users <slurm-users-bounces at lists.schedmd.com> On Behalf Of Juergen Salk
Sent: Tuesday, 23 March 2021 8:39 PM
To: Slurm User Community List <slurm-users at lists.schedmd.com>
Subject: Re: [slurm-users] Slurm prolog export variable

Hi Mike,

for pushing environvent variables into the job environment, you'll have to use the TaskProlog script (not the regular Prolog script). 

The location of the TaskProlog script needs to be defined in slurm.conf, e.g. 


and the standard output of TaskProlog can be used to export custom environvent variables, e.g.

echo "export SCRATCH=/scratch/$SLURM_JOB_USER/$SLURM_JOB_ID"

There is some more information on TaskProlog in the slurm.conf man page and also here: https://slurm.schedmd.com/prolog_epilog.html

Best regards

Jürgen Salk
Scientific Software & Compute Services (SSCS)
Kommunikations- und Informationszentrum (kiz) Universität Ulm
Telefon: +49 (0)731 50-22478
Telefax: +49 (0)731 50-22471

* Yap, Mike <M.Yap at massey.ac.nz> [210323 02:12]:
> Hi All
> Can anyone assist the following
> We're using Bright Cluster 9.1 with CentOS 7.9 running with slurm 2.02.6
> We have a script running on prolog exporting the SCRATCH as variable for user running job
> Addition command on the script to create a user folder accordingly
> When submitting the job, the folder is created without any error on the compute node (which indicate the prolog is being executed without an issue) but $SCRATCH seems to be undone once the prolog script is done
> We also tried to create an additional script to only export SCRATCH but no luck
> We have been using the same script for an older setup and it work fine. Any suggestion if there is any workaround to define $SCRACTH beside getting user to define it in their submit script ?
> Prolog script
> #!/bin/sh
> mkdir --parents $SCRATCH
> Thanks
> Mike

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