Hi, It was mentioned in the devel mailing list that for 2 networks setup, if the cluster network failed, the cluster behave pretty badly. Ref: http://article.gmane.org/gmane.comp.file-systems.ceph.devel/12285/match=cluster+network+fail May I know if this problem still exist in cuttlefish or dumpling? If I have 2 racks of servers in a cluster and a total of 5 mons. Rack1 contains 3 mons, 120 osds and rack2 contains 2 mons, 120 osds. In a 2 networks setup, May I know what will happen when the following problem occurs: 1. Public network links between rack1 and rack2 failed resulting rack1 mons uncontactable with rack2 mons. osds of both racks still connected. Will the cluster see it as 2 out of 5 mons failed or 3 out of 5 mons failed? 2. Cluster network links between rack1 and rack2 failed resulting osds in rack1 and osds in rack2 disconnected as mentioned above. 3. Both network links between rack1 and rack2 failed. Split-brain seems to occur. Will the cluster halt? Or rack 1 starts to self-healed and replicate data in rack1 since rack1 will have 3 mons out of 5 mons working? In the above scenarios, all links within the rack are all working. Your valuable comments are greatly appreciated. Keith _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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