On 10-09-27 09:12 AM, Rohit tripathi wrote: > Dear sir > > I need to know for redhat HA cluster we need shared storage it is > compulsory or not or we can configure HA cluster without shared storage. > > > regards > > Rohit Short answer; Yes, a cluster is required. Longer answer; Just to clarify, there are two types of cluster; HA (Heartbeat) and RHCS (Red Hat Cluster Services). Assuming by "shared storage" you are talking about GFS2 partitions, then yes, you must have a cluster. The reason is that GFS2 (and possibly OCFS2, though I am not certain) require the DLM (Distributed Lock Manager) provided by the cluster to ensure safe access to the shared storage. Further, the cluster provides critical fencing so that nodes that fail can be removed from the cluster and safe access to the shared storage can be regained. Cheers, -- Digimer E-Mail: linux@xxxxxxxxxxx AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
