Service failover ranking entries

The controller creates an entry in the AR System Service Failover Ranking form under the following circumstances:

• When an entry is created in the AR System Service Whiteboard form
• When a waiting or active provider is examined as a possible highest rank

If no other rankings exist for the service, the entry receives a ranking of 1.  If other rankings exist, the entry receives a null ranking (that is, an unset ranking), which is treated as the lowest ranking (MAXINT (2³² - 1)). This ranking assumes that existing providers are already working, and a failover is not triggered when you introduce a new provider.

Rank is in ascending numerical order. Service providers with the numerically lower rank are chosen before ranks of greater value (negative-valued rank takes a higher precedence over positive-valued rank). If two providers of the same service have the same rank, then the service failover controller chooses one.