I did this on my cluster and there was a huge number of pg rebalanced. I think setting this option to 'on' is a good idea if it's a brand new cluster. Dan van der Ster <dan@xxxxxxxxxxxxxx> 于2020年6月16日周二 下午7:07写道： > Could you share the output of > > ceph osd pool ls detail > > ? > > This way we can see how the pools are configured and help recommend if > pg_autoscaler is worth enabling. > > Cheers, Dan > > On Tue, Jun 16, 2020 at 11:51 AM Boris Behrens <bb@xxxxxxxxx> wrote: > > > > I read about the "warm" option and we are already discussing this. > > > > I don't know if the pgs needs a tuning. I don't know what the impact > > is and if there will be any difference if we enable it. > > > > The, meanwhile gone, last ceph admin made a ticket, and I am not > > particularly familiar with ceph. So I need to work on this ticket and > > I try not to trash our ceph storage :-) > > > > Am Di., 16. Juni 2020 um 11:39 Uhr schrieb Dan van der Ster > > <dan@xxxxxxxxxxxxxx>: > > > > > > Hi, > > > > > > I agree with "someone" -- it's not a good idea to just naively enable > > > pg_autoscaler on an existing cluster with lots of data and active > > > customers. > > > > > > If you're curious about this feature, it would be harmless to start > > > out by enabling it with pg_autoscale_mode = warn on each pool. > > > This way you can see what the autoscaler would do if it were set to > > > *on*. Then you can tweak all the target_size_ratio or > > > target_size_bytes accordingly. > > > > > > BTW, do you have some feeling that your 17000 PGs are currently not > > > correctly proportioned for your cluster? > > > > > > -- Dan > > > > > > On Tue, Jun 16, 2020 at 11:31 AM Boris Behrens <bb@xxxxxxxxx> wrote: > > > > > > > > Hi, > > > > > > > > I would like to enable the pg_autoscaler on our nautilus cluster. > > > > Someone told me that I should be really really careful to NOT have > > > > customer impact. > > > > > > > > Maybe someone can share some experience on this? > > > > > > > > The Cluster got 455 OSDs on 19 hosts with ~17000 PGs and ~1petabyte > > > > raw storage where ~600TB raw is used. > > > > _______________________________________________ > > > > ceph-users mailing list -- ceph-users@xxxxxxx > > > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > > > > > > > > -- > > Die Selbsthilfegruppe "UTF-8-Probleme" trifft sich diesmal abweichend > > im groüen Saal. > _______________________________________________ > 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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