Hi everyone, I'm studying Ceph replication and peering and have a doubt in how Ceph handles cleaning of stale objects on primary OSD failure. Scenario: Consider a placement group: PG1, whose acting set is [A, B, C] and A is the primary. t1: Client writes an object to A t2: A initiates local write t3: A sends replication request to B t4: A sends replication request to C t5: A completes local write t6: A gets replication response from B t7: A gets replication response from C t8: A is crashed and haven't sent acknowledgement to the client In case if A never comes back, the object written in B and C would be stale as it is not acknowledged to the client. How does Ceph cleans this stale object? Also, it would be helpful if you can share any documentation or articles explaining Ceph replication and peering in low-level. Regards, Vigneshwar.