Session failover ensures that session data remains accessible to OpenSSO Enterprise servers and OpenSSO Enterprise Policy Agents. Service requests are routed to a failover server, the user's session continues uninterrupted, and no user data is lost. The OpenSSO Enterprise Session Service maintains authenticated session states and continues processing new client requests subsequent to the failure. In most cases, without session failover, after system failure and subsequent service recovery, the user would have to re-authenticate.
Session failover is critical when end-users' transactions involve financial data or other sensitive information that is difficult to recover when a system failure occurs. With session failover, when a system failover occurs, the user's transaction can proceed uninterrupted. Session failover is less important if end-users are, for example, reading but not writing data.