On 1/19/20 12:07 PM, Stefan Kooman wrote: > Hi, > > Is there any logic / filtering which PGs to backfill at any given time > that takes into account the OSD the PG is living on? > > Our cluster is backfilling a complete pool now (512 PGs) and (currently) > of the 7 active+remapped+backfilling there are 4 of them on the same > OSD. Which stresses this OSD way more than needed. It would be nice if > the selection criteria for which PG to backfill (and / or recover) from > would include the OSD as selection criterion in order to spread the load > across different OSDs. > Afaik the OSDs decide this themselves. The primary OSD of a PG will negotiate with other OSDs to determine if they can backfill or not. If you set max_backfills to 4 the OSDs will try to use this as much as possible. The MONs do not decide which OSD starts to backfill and which don't. Wido > Gr. Stefan > > > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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