On Wed, 11 Mar 2015, Christian Balzer wrote: > On Tue, 10 Mar 2015 12:34:14 -0700 (PDT) Sage Weil wrote: > > > > Adjusting CRUSH maps > > -------------------- > > > > * This point release fixes several issues with CRUSH that trigger > > excessive data migration when adjusting OSD weights. These are most > > obvious when a very small weight change (e.g., a change from 0 to > > .01) triggers a large amount of movement, but the same set of bugs > > can also lead to excessive (though less noticeable) movement in > > other cases. > > > > However, because the bug may already have affected your cluster, > > fixing it may trigger movement *back* to the more correct location. > > For this reason, you must manually opt-in to the fixed behavior. > > > It would be nice to know at what version of Ceph those bugs were > introduced. This bug has been present in CRUSH since the beginning. sage _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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