[slurm-users] Fairshare: Penalising unused memory rather than used memory?

Loris Bennett loris.bennett at fu-berlin.de
Wed Oct 11 08:53:08 UTC 2023

Diego Zuccato <diego.zuccato at unibo.it> writes:

> IIUC Loris is looking for a method to do that automatically.
> Since there is a "used memory" metric, a corresponding "wasted memory"
> (or "wasted CPU") one with corresponding weights in priority
> calculations could be useful.

Yes, an automated solution is indeed what I am after.

A "naughty" list wouldn't really help, since there is quite a spectrum.
I would also need at least a "naive" list, an "erratic" list, and
probably a thankfully fairly short "recalcitrant" list.



> Diego
> Il 11/10/2023 09:54, Williams, Gareth (IM&T, Black Mountain) ha scritto:
>> Hi Loris, You could add them to a naughty list (please use a better
>> term...) and apply a fixed commensurate priority penalty.  That is
>> simple (and can apply to a range of unpreferred behaviour) and
>> provides a clear motivation to change. Could be done with QOS unless
>> you already use that in a conflicting way.
>> Gareth
>> Get Outlook for Android <https://aka.ms/ghei36>
>> ------------------------------------------------------------------------
>> *From:* slurm-users <slurm-users-bounces at lists.schedmd.com> on
>> behalf of Loris Bennett <loris.bennett at fu-berlin.de>
>> *Sent:* Wednesday, October 11, 2023 5:26:38 PM
>> *To:* Slurm Users Mailing List <slurm-users at lists.schedmd.com>
>> *Subject:* [slurm-users] Fairshare: Penalising unused memory rather
>> than used memory?
>> Hi,
>> We have an increasing number of users who are unable (or unwilling)
>> to
>> estimate their memory requirements accurately.  We include memory in our
>> calculation of fairshare usage and thus penalise everyone who requests
>> large amounts of memory, whether it is needed or not.
>> Therefore I would be interested in knowing whether one can take into
>> account the *requested but unused memory* when calculating usage.  Is
>> this possible?
>> Cheers,
>> Loris
>> -- Dr. Loris Bennett (Herr/Mr)
>> ZEDAT, Freie Universität Berlin
Dr. Loris Bennett (Herr/Mr)
ZEDAT, Freie Universität Berlin

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