On Wed, 1 May 2019 at 01:58, Dan van der Ster <dan@xxxxxxxxxxxxxx> wrote: > On Tue, Apr 30, 2019 at 8:26 PM Igor Podlesny <ceph-user@xxxxxxxx> wrote: [...] > All of the clients need to be luminous our newer: > > # ceph osd set-require-min-compat-client luminous > > You need to enable the module: > > # ceph mgr module enable balancer (Enabled by default according to the docs.) > > You probably don't want to it run 24/7: > > # ceph config-key set mgr/balancer/begin_time 0800 > # ceph config-key set mgr/balancer/end_time 1800 oh, that's handy. > The default rate that it balances things are a bit too high for my taste: > > # ceph config-key set mgr/balancer/max_misplaced 0.005 > # ceph config-key set mgr/balancer/upmap_max_iterations 2 > > (Those above are optional... YMMV) Yep, but good to know! > > Now fail the active mgr so that the new one reads those new options above. > > # ceph mgr fail <the active one> > > Enable the upmap mode: > > # ceph balancer mode upmap > > Test it once to see that it works at all: > > # ceph balancer optimize myplan > # ceph balancer show myplan > # ceph balancer reset > > (any errors, start debugging -- use debug_mgr = 4/5 and check the > active mgr's log for the balancer details.) > > # ceph balancer on > > Now it'll start moving the PGs around until things are quite well balanced. > In our clusters that process takes a week or two... it depends on > cluster size, numpgs, etc... > > Hope that helps! Thank you :) -- End of message. Next message? _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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