On Sat, Oct 22, 2016 at 8:27 AM, fridifree <fridifree@xxxxxxxxx> wrote: > Hi, > > What is the ceph tunables? how it affects the cluster? You can read more about CRUSH tunables at [1], but tunables aren't in play here - it's just the subject of that email. > I upgrade my kernel I do not understand why I have to disable features? Because even the latest kernel doesn't support all rbd image features, and for 4.8 and below you need to disable those 4 features. (4.9-rc1 added support for exclusive-lock, so technically you don't have to disable it on 4.9, but then exclusive-lock feature not very useful on its own.) [1] http://docs.ceph.com/docs/master/rados/operations/crush-map/#tunables Thanks, Ilya _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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