On 08/29/2013 03:39 PM, Athanasios Kostopoulos wrote: > To change the question and expand a bit: are there SPOFs in ceph's > design? How one can built a really robust ceph "cluster"? There are no SPOFs in ceph. Except for the fact that a ceph cluster likes to reside in one close geographic region. You build as many OSD's as you see fit. You build at least 3 MON's. You create a CRUSH map that depicts your failure domains, so ceph can deal with data relocation and build a redundancy topology according to your physical failure domains. If you want to go for MDS, you start multiple MDS instances, with active / passive failover. Wolfgang -- http://www.wogri.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com