Hi everyone, I had the autoscale_mode set to "on" and the autoscaler went to work and started adjusting the number of PGs in that pool. Since this implies a huge shift in data, the reweights that the balancer had carefully adjusted (in crush-compat mode) are now rubbish, and more and more OSDs become nearful (we sadly have very different sized OSDs).
Now apparently both manager modules, balancer and pg_autoscaler, have the same threshold for operation, namely target_max_misplaced_ratio. So the balancer won't become active as long as the pg_autoscaler is still adjusting the number of PGs. I already set the autoscale_mode to "warn" on all pools, but apparently the autoscaler is determined to finish what it started. Is there any way to pause the autoscaler so the balancer has a chance of fixing the reweights? Because even in manual mode (ceph balancer optimize), the balancer won't compute a plan when the misplaced ratio is higher than target_max_misplaced_ratio. I know about "ceph osd reweight-*", but they adjust the reweights (visible in "ceph osd tree"), whereas the balancer adjusts the "compat weight-set", which I don't know how to convert back to the old-style reweights. Best regards, Jan-Philipp _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
