We had a MASSIVE data movement upon changing the crush rules to device class based one. I'm not sure about the exact reasons, but I assume that the order of hosts in the crush tree has changed (hosts are ordered lexically now...), which resulted in about 80% of data being moved around.
What is you failure domain? Host I think? This cluster failure domain is rack. k _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
