Hi all, I have a ceph cluster with 3 nodes. ceph version is 16.2.9. There are 7 SSD OSDs on each server and one pool that resides on these OSDs. My OSDs are terribly unbalanced: ID CLASS WEIGHT REWEIGHT SIZE RAW USE DATA OMAP META AVAIL %USE VAR PGS STATUS TYPE NAME -9 28.42200 - 28 TiB 9.3 TiB 9.2 TiB 161 MiB 26 GiB 19 TiB 32.56 1.09 - root ssddisks -2 9.47400 - 9.5 TiB 3.4 TiB 3.4 TiB 66 MiB 9.2 GiB 6.1 TiB 35.52 1.19 - host px1-ssd 0 ssd 1.74599 0.85004 1.7 TiB 810 GiB 807 GiB 3.2 MiB 2.3 GiB 978 GiB 45.28 1.51 26 up osd.0 5 ssd 0.82999 0.85004 850 GiB 581 GiB 580 GiB 22 MiB 912 MiB 269 GiB 68.38 2.29 19 up osd.5 6 ssd 0.82999 1.00000 850 GiB 8.2 GiB 7.8 GiB 9.5 MiB 435 MiB 842 GiB 0.97 0.03 4 up osd.6 7 ssd 0.82999 1.00000 850 GiB 294 GiB 293 GiB 26 MiB 591 MiB 556 GiB 34.60 1.16 11 up osd.7 16 ssd 1.74599 0.85004 1.7 TiB 872 GiB 869 GiB 3.1 MiB 2.3 GiB 916 GiB 48.75 1.63 27 up osd.16 23 ssd 1.74599 1.00000 1.7 TiB 438 GiB 436 GiB 1.5 MiB 1.7 GiB 1.3 TiB 24.48 0.82 14 up osd.23 24 ssd 1.74599 1.00000 1.7 TiB 444 GiB 443 GiB 1.6 MiB 1.0 GiB 1.3 TiB 24.81 0.83 17 up osd.24 -6 9.47400 - 9.5 TiB 2.9 TiB 2.9 TiB 46 MiB 8.1 GiB 6.6 TiB 30.39 1.02 - host px2-ssd 12 ssd 0.82999 1.00000 850 GiB 154 GiB 154 GiB 21 MiB 368 MiB 696 GiB 18.16 0.61 9 up osd.12 13 ssd 0.82999 1.00000 850 GiB 144 GiB 143 GiB 527 KiB 469 MiB 706 GiB 16.92 0.57 4 up osd.13 14 ssd 0.82999 1.00000 850 GiB 149 GiB 149 GiB 16 MiB 299 MiB 700 GiB 17.58 0.59 7 up osd.14 29 ssd 1.74599 1.00000 1.7 TiB 449 GiB 448 GiB 1.6 MiB 1.4 GiB 1.3 TiB 25.11 0.84 20 up osd.29 30 ssd 1.74599 0.85004 1.7 TiB 885 GiB 882 GiB 3.1 MiB 2.3 GiB 903 GiB 49.48 1.65 31 up osd.30 31 ssd 1.74599 1.00000 1.7 TiB 728 GiB 727 GiB 2.6 MiB 1.8 GiB 1.0 TiB 40.74 1.36 22 up osd.31 32 ssd 1.74599 1.00000 1.7 TiB 438 GiB 437 GiB 1.6 MiB 1.4 GiB 1.3 TiB 24.51 0.82 15 up osd.32 -4 9.47400 - 9.5 TiB 3.0 TiB 3.0 TiB 49 MiB 8.7 GiB 6.5 TiB 31.78 1.06 - host px3-ssd 19 ssd 0.82999 1.00000 850 GiB 293 GiB 292 GiB 14 MiB 500 MiB 557 GiB 34.47 1.15 9 up osd.19 20 ssd 0.82999 1.00000 850 GiB 290 GiB 290 GiB 10 MiB 482 MiB 560 GiB 34.15 1.14 10 up osd.20 21 ssd 0.82999 1.00000 850 GiB 148 GiB 147 GiB 16 MiB 428 MiB 702 GiB 17.36 0.58 5 up osd.21 25 ssd 1.74599 1.00000 1.7 TiB 446 GiB 445 GiB 1.8 MiB 1.6 GiB 1.3 TiB 24.96 0.83 19 up osd.25 26 ssd 1.74599 1.00000 1.7 TiB 739 GiB 737 GiB 2.6 MiB 2.0 GiB 1.0 TiB 41.33 1.38 29 up osd.26 27 ssd 1.74599 1.00000 1.7 TiB 725 GiB 723 GiB 2.6 MiB 2.1 GiB 1.0 TiB 40.55 1.36 21 up osd.27 28 ssd 1.74599 1.00000 1.7 TiB 442 GiB 440 GiB 1.6 MiB 1.7 GiB 1.3 TiB 24.72 0.83 17 up osd.28 I have done a "ceph osd reweight-by-utilization" and "ceph osd set-require-min-compat-client luminous". The pool has 32 PGs which were set by autoscale_mode, which is on. Why are my OSDs, so unbalanced? I have osd.5 with 68.3% and osd.6 with 0.97%.... Also when the reweight-by-utilization, osd.5 utilization actually increased... What am i missing here? Sp