Just chiming in to say that this too has been my preferred method for adding [large numbers of] OSDs.
Set the norebalance nobackfill flags. Create all the OSDs, and verify everything looks good. Make sure my max_backfills, recovery_max_active are as expected. Make sure everything has peered. Unset flags and let it run. One crush map change, one data movement. Reed > > That works, but with newer releases I've been doing this: > > - Make sure cluster is HEALTH_OK > - Set the 'norebalance' flag (and usually nobackfill) > - Add all the OSDs > - Wait for the PGs to peer. I usually wait a few minutes > - Remove the norebalance and nobackfill flag > - Wait for HEALTH_OK > > Wido > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > <http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com>
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