Hi Felix, With `ceph balancer off` the upmap balancer will not move any PGs around. https://docs.ceph.com/en/latest/rados/operations/balancer/ Cheers, Dan On Wed, Nov 30, 2022 at 1:20 PM Stolte, Felix <f.stolte@xxxxxxxxxxxxx> wrote: > > Hi Dan, > > thanks for your reply. I wasn’t worried about the setting itself, but about the balancer starting to use the pg-upmap feature (which currently fails, because of the jewel setting). I would assume though, that the balancer is using pg-upmap in a throttled way to avoid performance issues. > > I will execute the command on the weekend, just to be safe. > > Best regards > Felix > > > --------------------------------------------------------------------------------------------- > --------------------------------------------------------------------------------------------- > Forschungszentrum Juelich GmbH > 52425 Juelich > Sitz der Gesellschaft: Juelich > Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 > Vorsitzender des Aufsichtsrats: MinDir Volker Rieke > Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender), > Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt, > Dr. Astrid Lambrecht, Prof. Dr. Frauke Melchior > --------------------------------------------------------------------------------------------- > --------------------------------------------------------------------------------------------- > > Am 30.11.2022 um 12:48 schrieb Dan van der Ster <dvanders@xxxxxxxxx>: > > Hi Felix, > > This change won't trigger any rebalancing. It will prevent older clients from connecting, but since this isn't a crush tunable it won't directly affect data placement. > > Best, > > Dan > > > On Wed, Nov 30, 2022, 12:33 Stolte, Felix <f.stolte@xxxxxxxxxxxxx> wrote: >> >> Hey guys, >> >> our ceph cluster is on pacific, but started on jewel years ago. While i was going through the logs of the mrg daemon i stumbled about the following entry: >> >> ========= >> [balancer ERROR root] execute error: r = -1, detail = min_compat_client jewel < luminous, which is required for pg-upmap. Try 'ceph osd set-require-min-compat-client luminous' before using the new interface >> ========= >> >> I could confirm that with `ceph osd get-require-min-compat-client` my value is still value. Reading the docs it looks to me, we really want to set this to luminous to benefit from a better pg distribution. My question for you is the following: >> >> Do I have to expect a major rebalancing after applying the 'ceph osd set-require-min-compat-client luminous‘ command, affecting my cluster IO? >> >> All my daemons are on pacific and all clients at least on nautilus. >> >> Thanks in advance and best regards >> Felix >> >> --------------------------------------------------------------------------------------------- >> --------------------------------------------------------------------------------------------- >> Forschungszentrum Juelich GmbH >> 52425 Juelich >> Sitz der Gesellschaft: Juelich >> Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 >> Vorsitzender des Aufsichtsrats: MinDir Volker Rieke >> Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender), >> Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt, >> Dr. Astrid Lambrecht, Prof. Dr. Frauke Melchior >> --------------------------------------------------------------------------------------------- >> --------------------------------------------------------------------------------------------- >> >> _______________________________________________ >> 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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