Hi, I guess this is an extremely silly question but... I often read that the ideal PG/OSD ratio should be 100-200 PGs per OSD. How is this calculated? When I do "ceph -s" it correctly says I have 320 PGs in 5 pools. However, this doesn't account for the replicas, does it? I mean I have the following table which shows how many PGs of which pool are stored on which osd. pool : 1 2 3 4 5 | SUM -------------------------------------------------------- osd.0 7 5 7 11 24 | 54 osd.1 16 18 15 37 26 | 112 osd.2 9 9 10 16 30 | 74 osd.3 6 12 9 11 23 | 61 osd.4 8 10 9 16 29 | 72 osd.5 10 14 9 17 17 | 67 osd.6 7 17 10 27 27 | 88 osd.7 11 17 11 22 38 | 99 osd.8 14 14 11 15 23 | 77 osd.9 8 12 5 20 19 | 64 -------------------------------------------------------- SUM : 96 128 96 192 256 | If I sum up all last columns I am clearly above 320... So 100/OSD or 200/OSD: Does it mean *AFTER* taking into account all replicas? Regards Martin -- "Things are only impossible until they're not" _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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