Hello List, i have this 3 node Setup with 17 hdds (new - spinning rust). After putting it all together and after resetting the manual Rack-Placements back to default it seems to recover forever. I also changed the pg placements at some time. The disks where very busy until this morning when i disabled scrubbing to see if this would speed up the recovery. Here is my current status: ---------------------------------------- root@ceph12:~# ceph -s cluster: id: 2ed9f8fb-1316-4ef1-996d-a3223a3dd594 health: HEALTH_WARN noscrub,nodeep-scrub flag(s) set services: mon: 3 daemons, quorum ceph10,ceph11,ceph12 (age 2h) mgr: ceph11(active, since 3h), standbys: ceph10, ceph12 osd: 17 osds: 17 up (since 3h), 17 in (since 11d); 18 remapped pgs flags noscrub,nodeep-scrub data: pools: 2 pools, 257 pgs objects: 9.62M objects, 37 TiB usage: 110 TiB used, 134 TiB / 244 TiB avail pgs: 1534565/28857846 objects misplaced (5.318%) 239 active+clean 16 active+remapped+backfill_wait 2 active+remapped+backfilling io: recovery: 25 MiB/s, 6 objects/s I set: ceph tell 'osd.*' injectargs --osd-max-backfills=6 --osd-recovery-max-active=9 My hourly recovery process seems not to really proceed (it decreeses and increases again): 5.410 5.036 5.269 5.008 5.373 5.769 5.555 5.103 5.067 5.135 5.409 5.417 5.373 5.197 5.090 5.458 5.204 5.339 5.164 5.425 5.692 5.383 5.726 5.492 6.694 6.576 6.362 6.243 6.011 5.880 5.589 5.433 5.846 5.378 5.184 5.647 5.374 5.513 root@ceph12:~# ceph osd perf (this is okay for spinning rust i guess) osd commit_latency(ms) apply_latency(ms) 17 0 0 13 0 0 11 57 57 9 4 4 0 0 0 1 79 79 14 43 43 2 0 0 3 0 0 16 43 43 4 33 33 5 0 0 6 0 0 7 0 0 10 0 0 12 0 0 8 48 48 iostat -xt 3 shows that they are busy but its not overloaded as i can tell. Any idea why it will only backfill 2? How could i speed this up? My other cluster with 7 nodes and very old hdds and 45 OSDs can make easily 76 objects/s Cheers, Michael