Hi!
I have a cluster with 106 osds and disk usage is varying from 166gb to 316gb. Disk usage is highly correlated to number of pg per osd (no surprise here). Is there a reason for ceph to allocate more pg on some nodes?
The biggest osds are 30, 42 and 69 (300gb+ each) and the smallest are 87, 33 and 55 (170gb each). The biggest pool has 2048 pgs, pools with very little data has only 8 pgs. PG size in biggest pool is ~6gb (5.1..6.3 actually).
Lack of balanced disk usage prevents me from using all the disk space. When the biggest osd is full, cluster does not accept writes anymore.
Here's gist with info about my cluster: https://gist.github.com/bobrik/fb8ad1d7c38de0ff35ae
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