|High Availability / Configuring Clusters|
Learn the steps to change the failover sequence in a cluster.
A standby server pings the active server every 10 seconds to make sure it is still active. When a standby server notices that the active server has failed, it goes into a "discovery mode" to find out the status of other servers in the cluster. If all other servers are still in standby, the server that entered discovery mode takes control of the cluster.
On some occasions, multiple standby servers may enter discovery mode at the same time. In this situation, the order in which servers are listed on the Cluster Setup page determines the order in which they will take control when failovers occur.