No, Marc. The recommended value is always the one that devs agreed on at a point in time. Keep it to the defaults. Frédéric. ________________________________ De : Marc <Marc@xxxxxxxxxxxxxxxxx> Envoyé : samedi 30 novembre 2024 22:49 À : Frédéric Nass; Laimis Juzeliūnas Cc: ceph-users Objet : RE: Squid: deep scrub issues So is this recommend for all new squid clusters? osd_scrub_chunk_max from 25 > > To clarify, Squid reduced osd_scrub_chunk_max from 25 to 15 to limit the > impact on client I/Os which may had led to increased (deep)scrubbing > times. > My advise was to raise this value back to 25 and see the influence of > this change. But clearly, this is a more serious matter. > > Thank you for creating tracker [1]. I'll do my best to ensure it gets > the appropriate visibility. > > Cheers, > Frédéric. > > [1] https://tracker.ceph.com/issues/69078 > > ----- Le 28 Nov 24, à 22:58, Laimis Juzeliūnas > laimis.juzeliunas@xxxxxxxxxx a écrit : > > > Hi all, sveikas, > > > > Thanks everyone for the tips and trying to help out! > > I've eventually raised a bug tracker for the case to get more > developers > > involved: https://tracker.ceph.com/issues/69078 > > > > We tried decreasing osd_scrub_chunk_max from 25 to 15 as per Frédéric > > suggestion, but unfortunately did not observe any signs relief. One > Squid user > > in reddit community thread confirmed the same after decreasing - no > results. > > There are more users there in the thread that tried out various > cluster > > configuration tunings, including osd_mclock_profile with > high_recovery_ops but > > still no one managed to get any good results. > > > > Our scrub cycle runs 24/7 with no time windows/schedules therefore no > > possibilities of queue buildups due to time constrains. > > And yes - our longest running pg now is 23 days in the deep scrub (and > still > > counting). > > > > > > Laimis J. > > _______________________________________________ > > ceph-users mailing list -- ceph-users@xxxxxxx > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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