I'm trying to create a partition with memory and CPU limits, enforced by
cgroups. The goal is to limit jobs in the partition to 1/4 the CPUs and
memory available on a single node.
I've created a QoS with memory limits, and then a partition which specifies
that QoS. But when I run jobs in the partition, the cgroups limits are
just under the actual amount of memory in the node (2G), rather than the
lower amount I specified.
I've also created an association for the partition, QoS, and my user
account with that limit. Still no effect on the cgroups memory limits.
What am I missing? Is this even possible?
/etc/slurm/cgroup.conf
CgroupAutomount=yes
ConstrainCores=yes
ConstrainRAMSpace=yes
excerpts from /etc/slurm/slurm.conf
EnforcePartLimits=yes
ProctrackType=proctrack/cgroup
TaskPlugin=task/cgroup
AccountingStorageEnforce=limits,associations
QoS:
Name Priority GraceTime Preempt PreemptMode
Flags UsageThres UsageFactor GrpTRES GrpTRESMins
GrpTRESRunMin GrpJobs GrpSubmit GrpWall MaxTRES MaxTRESPerNode
MaxTRESMins MaxWall MaxTRESPU MaxJobsPU MaxSubmitPU MaxTRESPA
MaxJobsPA MaxSubmitPA MinTRES
quarterte+ 0 00:00:00 cluster
1.000000
cpu=1,mem=400M
Association:
Cluster Account User Partition Share GrpJobs GrpTRES
GrpSubmit GrpWall GrpTRESMins MaxJobs MaxTRES MaxTRESPerNode
MaxSubmit MaxWall MaxTRESMins QOS Def QOS
GrpTRESRunMin
linux science calvin light 1 mem=400M
mem=400M
quartertest
This is Slurm 18.08, running on an OHPC cluster with the CentOS 7.6 OS.
Sincerely,
Calvin Dodge
