Dear all,

are experiencing problems with job backfilling having this cluster setup:

- two QOS defined within the same partition of size 1000 nodes
- QOS A has a high priority (e.g. 10000) and a node limit of 10
- QOS B has a low priority (e.g. 100) and a node limit of 990

If QOS A has 10 nodes occupied + further jobs queued, no jobs in QOS B will be started since their priority is too low.

Here Information from slurm.conf:

SLURM_VERSION           = 16.05.6
PriorityType            = priority/multifactor
SchedulerParameters = bf_max_job_user=20,bf_interval=120,default_queue_depth=50,bf_window=4320,bf_continue,max_sched_time=6,bf_resolution=1800,defer
SchedulerType           = sched/backfill


Are there any suggestion on how to configure the backfilling or the QOS setup to make jobs run in QOS B?


thanks in advance!

best regards,
Markus



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Dr. Markus Stöhr
Zentraler Informatikdienst BOKU Wien / TU Wien
Wiedner Hauptstraße 8-10
1040 Wien

Tel. +43-1-58801-420754
Fax  +43-1-58801-9420754

Email: [email protected]
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