One Listener That Can Fail Over for Several Real Application Clusters Instances

One listener that can fail over serves several Real Application Clusters instances on the same node. When the listener fails over to another node, the listener serves several Real Application Clusters instances on the other node.

The listener uses Oracle's TAF and load balancing to distribute client connections across all Real Application Clusters instances. To ensure fast error detection and short failover times, the listener listens on an address that is represented by a LogicalHostname resource.

In this situation, configure the listener resource as follows:

• Configure the listener resource and the LogicalHostname resource in the same resource group.

• Ensure that this resource group is mastered on the nodes on which Oracle Real Application Clusters is running.

For more information, see LogicalHostname Resources for Oracle Listener Resources.