Deploying Sybase RAP in a High Availability environment with OpenSwitch requires at least two nodes to provide an Active/Active standby capability. RAP read/write applications apply inbound transactions in two parallel streams to both the Primary and Standby RAPCache databases. After failover, data flow to the Standby database meets the same latency conditions that existed before failover.
To ensure high availability in a production environment, Sybase strongly recommends that you install OpenSwitch on a host other than the host where Adaptive Server and Replication Server are installed.