[slurm-users] Re: preempt/qos is not working as expected

I am not sure I fully understand your question, but if I do I believe the problem is that you forgot to add

PreemptMode=off

to the partitions which you do NOT want to be preempted, otherwise everything gets the cluster default. For example I have configured mine as follows

PreemptType = preempt/partition_prio PreemptMode=REQUEUE PartitionName=highpriority DefMemPerCPU=4580 Nodes=node[01-36] PreemptMode=off PriorityTier=500 State=UP PartitionName=lowpriority DefMemPerCPU=4580 Nodes=node[01-36] PreemptMode=cancel PriorityTier=100 State=UP

and only jobs in the lowpriority partition get cancelled, other partitions (not shown) get requeued and highpriority one are left alone

HTH

On Mon, Feb 16, 2026 at 8:12 AM Marchand Aurélia via slurm-users < slurm-users@lists.schedmd.com> wrote:

Hello,

I want too use QOS preemption.

my configuration is :

preemptMode = GANG,SUSPEND PreemptParameters = (null) PreemptType = preempt/qos PriorityType = priority/multifactor SelectType = select/cons_tres SelectTypeParameters = CR_CPU

I define 3 partitions :

PartitionName=DEFAULT Nodes=ALL Default=NO MaxTime=15-0 State=UP OverSubscribe=FORCE:1 PreemptMode=suspend PartitionName=veryhi PriorityTier=30 AllowQos=veryhi_short,gaia_veryhi_short PartitionName=hi PriorityTier=20 AllowQos=hi_short,gaia_hi_short PartitionName=def PriorityTier=10 OverSubscribe=No Default=YES AllowQos=def_short

I define 5 QOS :

sacctmgr show qos format=name%20,Priority,Preempt%40,PreemptMode Name Priority Preempt PreemptMode

---

---

             normal              0                     cluster
     veryhi_short      20000 def_short     suspend
            hi_short      10000 def_short     suspend
          def_short              0 normal     suspend

gaia_veryhi_short 20000 def_short,gaia_hi_short suspend gaia_hi_short 10000 def_short suspend

I define account :

sacctmgr show ass format=account%20,user,qos%60 Account User QOS

---

---

          gaia_hi   user1 gaia_hi_short
   gaia_veryhi   user1 gaia_veryhi_short
           mis_hi   user1    hi_short
                def   user1

def_short

I submit 2 jobs :

JOBID PARTITION QOS ACCOUNT NAME USER STATE PRIORITY 159 hi hi_short mis_hi test user1 SUSPENDE 637 160 veryhi gaia_veryhi_short gaia_veryhi test user1 RUNNING 1150

I don't understand why job 160 suspend job 159, the partition priority is higher, but I want gaia_veryhi_short QOS preempt only def_short and gaia_hi_short QOS.

The QOS of job 159 is hi_short.

Where is my configuration error ?

Thanks for your time,

Aurélia

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