Hi All, I recently added some OSDs to the Ceph cluster (0.94.2). I noticed that 'ceph -s' reported both misplaced AND degraded PGs. Why should any PGs become degraded? Seems as though Ceph should only be reporting misplaced PGs? >From the Giant release notes: Degraded vs misplaced: the Ceph health reports from ‘ceph -s’ and related commands now make a distinction between data that is degraded (there are fewer than the desired number of copies) and data that is misplaced (stored in the wrong location in the cluster). The distinction is important because the latter does not compromise data safety. Does Ceph delete some replicas of the PGs (leading to degradation) before re- replicating on the new OSD? This does not seem to be the safest algorithm. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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