Hi, which values are all changed with "ceph osd crush tunables optimal"? Is it perhaps possible to change some parameter the weekends before the upgrade is running, to have more time? (depends if the parameter are available in 0.72...). The warning told, it's can take days... we have an cluster with 5 storage node and 12 4TB-osd-disk each (60 osd), replica 2. The cluster is 60% filled. Networkconnection 10Gb. Takes tunables optimal in such an configuration one, two or more days? Udo On 14.07.2014 18:18, Sage Weil wrote: > I've added some additional notes/warnings to the upgrade and release > notes: > > https://github.com/ceph/ceph/commit/fc597e5e3473d7db6548405ce347ca7732832451 > > If there is somewhere else where you think a warning flag would be useful, > let me know! > > Generally speaking, we want to be able to cope with huge data rebalances > without interrupting service. It's an ongoing process of improving the > recovery vs client prioritization, though, and removing sources of > overhead related to rebalancing... and it's clearly not perfect yet. :/ > > sage > > >
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