Dear all I have these settings in slurm.conf: . ... PreemptType=preempt/partition_prio PreemptMode=REQUEUE PartitionName=gpus-opp Nodes=btc-ter-gpu-[03-05],btc-dfa-gpu-06,btc-dfa-gpu-02 State=UP PriorityTier=15 PartitionName=mpicms Nodes=btc-ter-03,btc-ter-gpu-05 AllowAccounts=cms,operators State=UP PriorityTier=20 .... My understanding was that the expected behavior is that a job submitted to the gpus-opp partition is always preempted (requeued) if the resources allocated by this job are requested by a job submitted to the mpicms partition (since 20 > 15) Did I get it right? I am asking because I see that sometimes this doesn't happen. I am still trying to debug the issue, but it looks like also the QoS is taken into account (and this doesn't make sense to me unless I am missing something) Thanks, Massimo