Failover Manager offers support for monitoring and failover of clusters with one or more Standby servers. You can add or remove nodes from the cluster as your demand for resources grows or shrinks.If a Master node reboots, Failover Manager may detect the database is down on the Master node and promote a Standby node to the role of Master. If this happens, the Failover Manager agent on the (rebooted) Master node will not get a chance to write the recovery.conf file; the rebooted Master node will return to the cluster as a second Master node. To prevent this, start the Failover Manager agent before starting the database server. The agent will start in idle mode, and check to see if there is already a master in the cluster. If there is a master node, the agent will verify that a recovery.conf file exists, and the database will not start as a second master.