Hi Bhandary, I'm not talking about replication, rather I want to know the best practice in implementing clustering for postgres servers(Shared Disk clusters, Shared Nothing clusters) which involve heartbeat/corosync, pacemaker, RHCS, choosing RAID levels, SAN's etc!!! Like what clustering means in other databases(for example SQL server, Oracle RAC) I want to know how to implement the same in Postgres(may be with the help of some tools). Regards, Pavan -- Sent from: http://www.postgresql-archive.org/PostgreSQL-admin-f2076596.html