[ceph-users] Re: Theory about min_size and its implications

This is not speculation: I have personally experienced this with an inherited 2R cluster.

On Mar 3, 2023, at 04:07, Janne Johansson <icepic.dz@gmail.com> wrote:

Do not assume the last PG needs to die in a horrible fire, killing several DC operators with it, it only takes a REALLY small outage, a fluke restart, a short network glitch for it to be away, while still having the last acknowledged write to it, making any 1-2-3-4-5 other PG replicas of it useless, since the cluster will know that this one missing OSD has the latest writes, and no other PG can replace it, it can't be "repaired" from others.