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Re: [HTCondor-users] Preemption while there are free slots



Hi,

the pslot preemption is a bit special in that partitionable slots get partly preempted to match a job requirement but in general the pslot preemption follows the 'regular' preemption rules as described in chapter 3.7.3 of the manual ...

best
christoph


--
Christoph Beyer
DESY Hamburg
IT-Department

Notkestr. 85
Building 02b, Room 009
22607 Hamburg

phone:+49-(0)40-8998-2317
mail: christoph.beyer@xxxxxxx


Von: "Zohar Kol" <zohar@xxxxxxxxxxx>
An: "htcondor-users" <htcondor-users@xxxxxxxxxxx>
Gesendet: Dienstag, 22. Dezember 2020 13:34:34
Betreff: [HTCondor-users] Preemption while there are free slots

Hi,


CondorVersion 8.8.9

Setup includes:

  1. Accounting group quota
  2. All dynamic slots
  3. allow_pslot_preemption


We see a lot of job evictions while there are plenty of free resources.

"Job was evicted" is followed by "Job executing on host..." in the next cycle.

This happens while there are machines that can serve the requirements of incoming job without preempting.


What configuration is the relevant place to handle this situation?


We've tried NEGOTIATOR_PRE_JOB_RANK and PREEMPTION_RANK but those evaluate the job and partitionable slot classad which have no knowledge of negotiator classad like  LastNegotiationCycleMatches<X>.


Any ideas?


Thank you


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