Bug #41756
Updated by Sebastian Wagner over 4 years ago
On a 30 OSD EC Pool (8+2) the auto-scale recommends a PG count of 2048 instead of a sane 256-512 amount <pre> ceph osd pool autoscale-status POOL SIZE TARGET SIZE RATE RAW CAPACITY RATIO TARGET RATIO BIAS PG_NUM NEW PG_NUM AUTOSCALE ecpool 104.6T 1.25 272.8T 0.4794 0.9000 1.0 512 2048 warn device_health_metrics 876.4k 3.0 92124M 0.0000 1.0 1 4 warn ecmeta 3461k 3.0 92124M 0.0001 1.0 100 4 warn </pre> 272.87100 root ec -5 90.95700 host sn-s01 3 hdd 9.09599 osd.3 up 1.00000 1.00000 4 hdd 9.09599 osd.4 up 1.00000 1.00000 5 hdd 9.09599 osd.5 up 1.00000 1.00000 6 hdd 9.09599 osd.6 up 1.00000 1.00000 7 hdd 9.09599 osd.7 up 1.00000 1.00000 8 hdd 9.09599 osd.8 up 1.00000 1.00000 9 hdd 9.09599 osd.9 up 1.00000 1.00000 10 hdd 9.09599 osd.10 up 1.00000 1.00000 11 hdd 9.09599 osd.11 up 1.00000 1.00000 12 hdd 9.09599 osd.12 up 1.00000 1.00000 -9 90.95700 host sn-s02 13 hdd 9.09599 osd.13 up 1.00000 1.00000 14 hdd 9.09599 osd.14 up 1.00000 1.00000 15 hdd 9.09599 osd.15 up 1.00000 1.00000 16 hdd 9.09599 osd.16 up 1.00000 1.00000 17 hdd 9.09599 osd.17 up 1.00000 1.00000 18 hdd 9.09599 osd.18 up 1.00000 1.00000 19 hdd 9.09599 osd.19 up 1.00000 1.00000 20 hdd 9.09599 osd.20 up 1.00000 1.00000 21 hdd 9.09599 osd.21 up 1.00000 1.00000 22 hdd 9.09599 osd.22 up 1.00000 1.00000 -17 90.95700 host sn-s03 29 hdd 9.09499 osd.29 up 1.00000 1.00000 30 hdd 9.09499 osd.30 up 1.00000 1.00000 31 hdd 9.09499 osd.31 up 1.00000 1.00000 32 hdd 9.09499 osd.32 up 1.00000 1.00000 33 hdd 9.09499 osd.33 up 1.00000 1.00000 34 hdd 9.09499 osd.34 up 1.00000 1.00000 35 hdd 9.09499 osd.35 up 1.00000 1.00000 36 hdd 9.09499 osd.36 up 1.00000 1.00000 37 hdd 9.09499 osd.37 up 1.00000 1.00000 38 hdd 9.09499 osd.38 up 1.00000 1.00000 </pre>