The Ingres High Availability Option for Windows Failover Clustering runs application instances only on a single node. Depending on how the data service has been configured, when the fault monitor detects an error, it either attempts to restart the instance on the same node or to start the instance on another node for failover.

Failover is the process by which a cluster automatically relocates a data service from a failed primary node to a designated secondary node. If a failover occurs, a brief interruption in service can occur, requiring you to reconnect after the failover has completed. Once reconnected, the physical server on which Ingres is running is transparent to the end user.

The automatic failover feature ensures that transactions are handled by an active node in the cluster if a hardware or software failure occurs.