Hi all, I think I have a subtle problem with either understanding CRUSH or in the actual implementation of my CRUSH map.
Consider the following CRUSH map: http://paste.debian.net/hidden/085b3f20/ I have 3 chassis' with 7 nodes each (6 of them OSDs). Size is 3, min_size is 2 on all pools. If i remove one chassis from the cluster (pull the network plugs, in this case), my naive first thought was that the cluster might recover fully, but I think this cannot be the case since it will never find a location that can satisfy the necessary conditions "provide three replicas on different chassis" - as there's only two in operaiton. However, after setting "size" to 2 on all pools, the cluster recovered from 33.3% degraded to 20.5% degraded, and is now sitting there. This is a lab cluster, I'm really only trying to understand what's happening. Can someone clear that up - I think i'm blind... Regards, --ck _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
