As said before, replication is great provided it works. It works well if it's understood and works even better if it's tested. This is a great reason to use repmgr utility.
repmgr 4.0 is an open source tool designed specifically for PostgreSQL replication. To get additional information about repmgr, visit http://www.repmgr.org/.
The repmgr utility provides a command-line interface and a management process (daemon) used to monitor and manage PostgreSQL servers involved in replication. The repmgr utility easily supports more than two nodes, with automatic failover detection.
