Dear all, I am writing to seek your assistance in resolving an issue with my Ceph cluster. Currently, the cluster is experiencing a problem where the number of Placement Groups (PGs) that need to undergo deepscrub and regular scrub cannot be completed in a timely manner. I have noticed that these PGs appear to be concentrated on a single OSD. I am seeking your guidance on how to address this issue and would appreciate any insights or suggestions you may have. Please find attached the Ceph health detail output for your reference. HEALTH_WARN 13 pgs not deep-scrubbed in time; 7 pgs not scrubbed in time [WRN] PG_NOT_DEEP_SCRUBBED: 13 pgs not deep-scrubbed in time pg 4.426 not deep-scrubbed since 2023-04-22T10:00:21.529716+0800 pg 4.f0 not deep-scrubbed since 2023-04-22T04:55:17.868881+0800 pg 4.b9 not deep-scrubbed since 2023-04-22T16:47:25.219603+0800 pg 4.87 not deep-scrubbed since 2023-04-22T20:01:02.508600+0800 pg 4.31 not deep-scrubbed since 2023-04-23T00:27:39.299893+0800 pg 4.5b9 not deep-scrubbed since 2023-04-19T21:03:47.041934+0800 pg 4.68a not deep-scrubbed since 2023-04-21T19:52:39.251293+0800 pg 4.6a4 not deep-scrubbed since 2023-04-22T16:20:51.078431+0800 pg 4.6ec not deep-scrubbed since 2023-04-21T11:20:33.661595+0800 pg 4.7a4 not deep-scrubbed since 2023-04-20T22:30:44.506420+0800 pg 4.7a2 not deep-scrubbed since 2023-04-16T12:05:56.586205+0800 pg 4.7b4 not deep-scrubbed since 2023-04-17T15:50:10.595292+0800 pg 4.7c8 not deep-scrubbed since 2023-04-19T15:10:12.673655+0800 [WRN] PG_NOT_SCRUBBED: 7 pgs not scrubbed in time pg 4.31e not scrubbed since 2023-04-24T13:34:26.103257+0800 pg 4.5b9 not scrubbed since 2023-04-24T07:20:53.891175+0800 pg 4.68a not scrubbed since 2023-04-24T03:37:58.070854+0800 pg 4.7a4 not scrubbed since 2023-04-24T02:55:25.912789+0800 pg 4.7b4 not scrubbed since 2023-04-24T10:04:46.889422+0800 pg 4.7c8 not scrubbed since 2023-04-24T13:36:07.284271+0800 pg 4.7d2 not scrubbed since 2023-04-24T14:47:19.365551+0800 Peter