Hi, I just looked into one customer cluster that we upgraded some time ago from Octopus to Quincy (17.2.6) and I'm wondering why there are still both pools, "device_health_metrics" and ".mgr". According to the docs [0], it's supposed to be renamed:
Prior to Quincy, the devicehealth module created a device_health_metrics pool to store device SMART statistics. With Quincy, this pool is automatically renamed to be the common manager module pool.
Now only .mgr has data while device_health_metrics is empty, but it has a newer ID: ses01:~ # ceph df | grep -E "device_health|.mgr" .mgr 1 1 68 MiB 18 204 MiB 0 254 TiB device_health_metrics 15 1 0 B 0 0 B 0 254 TiB On a test cluster (meanwhile upgraded to latest Reef) I see the same: ceph01:~ # ceph df | grep -E "device_health_metrics|.mgr" .mgr 38 1 577 KiB 2 1.7 MiB 0 71 GiB device_health_metrics 45 1 0 B 0 0 B 0 71 GiB Since there are still many users who haven't upgraded to >= Quincy yet, this should be clarified/fixed. I briefly checked tracker.ceph.com, but didn't find anything related to this. I'm currently trying to reproduce it on a one-node test cluster which I upgraded from Pacific to Quincy, but no results yet, only that the renaming was successful. But for the other clusters I don't have enough logs to find out how/why the device_health_metrics pool had been recreated. Thanks, Eugen [0] https://docs.ceph.com/en/latest/mgr/administrator/#module-pool