Den ons 7 maj 2025 kl 10:59 skrev Torkil Svensgaard <tor...@drcmr.dk>: > We are looking at a cluster split between two DCs with the DCs as > failure domains. > > Am I right in assuming that any recovery or backfill taking place should > largely happen inside each DC and not between them? Or can no such > assumptions be made? > Pools would be EC 4+8, if that matters.
Unless I am mistaken, the first/primary of each PG is the one "doing" the backfills, so if the primaries are evenly distributed between the sites, the source of all backfills would be in the remote DC in 50% of the cases. I do not think the backfills are going to calculate how it can use only "local" pieces to rebuild a missing/degraded PG piece without going over the DC-DC link even if it is theoretically possible. -- May the most significant bit of your life be positive. _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
