On Mon, May 28, 2018 at 1:50 PM, Fulvio Galeazzi <fulvio.galeazzi@xxxxxxx> wrote: > Hallo, > I am using 12.2.4 and started using "ceph balancer". Indeed it does a > great job, thanks! > > I have few comments: > > - in the documentation http://docs.ceph.com/docs/master/mgr/balancer/ > I think there is an error, since > ceph config set mgr mgr/balancer/max_misplaced .07 > should be replaced by > ceph config-key set mgr/balancer/max_misplaced 0.07 You're reading the "master" branch docs, in which the commands are different. The luminous docs are here: http://docs.ceph.com/docs/luminous/ John > - when running in automatic mode, I observed that althought I set > max_misplaced to 1%, sometimes the fraction of misplaced PGs goes > slightly above (up to 1.5% or so): probably because a new round of > optimization takes place as soon as there are no degraded objects > but there may still be some misplaced objects around? > Not a big deal, though, just need to remember to set max_misplaced > to a bit lower value. > > - do you think it would make sense to be able to optionally restrict > balancer to run only on a given device-class? I have defined a > custom device class "big" which I use for EC-backed pools, and would > like to selectively include/exclude those units in/from the > optimization process. > > Thanks a lot! > > Fulvio > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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