Implementation Guide › Architectural Considerations › Architectural Use Cases › Redundancy and High Availability › Policy Server to User Store Communication › Failover

Failover

Failover is an optional setting in the SiteMinder user store object. In failover mode, a Policy Server distributes all requests to the primary user store and proceeds as follows:

1. If the primary user store does not respond, the Policy Server deems it unavailable and redirects the request, and all subsequent requests, to the next user store that the SiteMinder user store object lists.
2. If the first and second user stores do not respond, the Policy Server deems them both unavailable and redirects the request, and all subsequent requests to the next user store that the SiteMinder user store object lists.

Note: For more information about configuring user store failover, see the Policy Server Configuration Guide.

If an unresponsive user store recovers, the user store is automatically returned to its original place in the failover list and begins receiving all Policy Server requests.

The following diagram illustrates the user store failover process: