Ticket 17820

Summary: Limiting CPUs/GPUs per user
Product: Slurm Reporter: carlos
Component: LimitsAssignee: Benjamin Witham <benjamin.witham>
Status: RESOLVED INFOGIVEN QA Contact:
Severity: 4 - Minor Issue    
Priority: --- CC: benjamin.witham
Version: 23.02.4   
Hardware: Linux   
OS: Linux   
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Description carlos 2023-10-02 14:33:18 MDT 
Hi

I'm trying to limit the use of CPUs and GPUs per user. I used sacctmgr to define the limits on one user test: 

sacctmgr -i modify User carlos set MaxTRES=gres/gpu=1
sacctmgr -i modify User carlos set MaxTRES=cpu=1

Account                    User       MaxTRES                  QOS
-------------------- ---------- ---------------- --------------------
root                                                        normal
 root                    carlos cpu=1,gres/gpu=1               normal


this is the script

#!/encs/bin/tcsh
#SBATCH --job-name=test
#SBATCH --nodes=1
#SBATCH --ntasks=1
#SBATCH --cpus-per-task=2
#SBATCH --mem=4G
##SBATCH --gres=gpu:2
#SBATCH --time=00:05:00
...

Either I comment --gres=gpu:2 to use cpus or --cpus-per-task=2 to use GPUs, when I run the script it bypasses the parameters configured in sacctmgr.

in slurm.conf
AccountingStorageEnforce=associations,limits

What am I missing? It could be done without using qos? the limits for some users (not always the same) will change from time to time.

Thanks
Comment 1 Benjamin Witham 2023-10-03 10:24:56 MDT 
> It could be done without using qos? the limits for some users (not always the 
> same) will change from time to time.

From your needs, It looks like the user limits is your best option, especially if these limits will change per user. In order for the AccountingStorageEnforce to take effect a slurmctld restart is required. Have you restarted the slurmctld since changing this parameter?

> https://slurm.schedmd.com/slurm.conf.html#OPT_AccountingStorageEnforce
Comment 2 carlos 2023-10-03 14:46:45 MDT 
(In reply to Benjamin Witham from comment #1)
> > It could be done without using qos? the limits for some users (not always the 
> > same) will change from time to time.
> 
> From your needs, It looks like the user limits is your best option,
> especially if these limits will change per user. In order for the
> AccountingStorageEnforce to take effect a slurmctld restart is required.
> Have you restarted the slurmctld since changing this parameter?
> 
> > https://slurm.schedmd.com/slurm.conf.html#OPT_AccountingStorageEnforce

Thanks, it is working fine now.
Comment 3 carlos 2023-10-03 14:48:14 MDT 
No more help needed in this case
Again, thank you for your time.

Closing ticket