Sun Java System Reference Configuration Series: Portal Service on Application Server Cluster

Session State Availability

Session state availability means that data associated with a user session is not lost during a service failover. When a service failover occurs, the session state data that is stored by the failed instance is made available to the failover instance. This mechanism is known as session failover. The result is that the service failover is transparent to the user: the user will not be required to log in again or to restart a business operation.

Session failover is supported in the reference configuration through two mechanisms:

Note –

When a user is successfully authenticated with Access Manager, the browser is redirected to a Portal Server instance. A portal desktop session is created on this instance and is mapped to the user's Access Manager session. This portal desktop session is used to track Portal Server specific information such as the user's merged display profile and provider properties. If a Portal Server instance fails, the desktop session is automatically re-created by using the user's display profile and attributes that are stored in the Access Manager's user session. However, provider properties that are stored in local memory are lost.