Hi, after seting ceph upgrade (0.72.2 to 0.80.3) I have issued "ceph osd crush tunables optimal" and after only few minutes I have added 2 more OSDs to the CEPH cluster...
So these 2 changes were more or a less done at the same time - rebalancing because of tunables optimal, and rebalancing because of adding new OSD... Result - all VMs living on CEPH storage have gone mad, no disk access efectively, blocked so to speak. Since this rebalancing took 5h-6h, I had bunch of VMs down for that long... Did I do wrong by causing "2 rebalancing" to happen at the same time ? Is this behaviour normal, to cause great load on all VMs because they are unable to access CEPH storage efectively ? Thanks for any input... -- Andrija Panić
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