The figure shows a high availability topology for Oracle Business Activity Monitoring.

A load balancer connects to two nodes, each of which runs Microsoft IIS and Web Applications. These nodes are connected to a hardware cluster with two nodes. One node is active, and the other node is a standby node. These nodes run the Active Data Cache, Report Cache, and Event Engine. These nodes can access a shared storage (the standby node accesses the shared storage only when the active node fails).

The nodes in the hardware cluster can also access a Real Application Clusters database.

The hardware cluster is associated with a virtual hostname ("adc.us.oracle.com" in the example) and a virtual IP address ("123.45.67.89" in the example).

There are two other nodes outside of the hardware cluster. Each of these nodes runs Enterprise Link and Plan Monitor. These nodes connect to the nodes in the hardware cluster.