The Failover Load Balancing Algorithm is a fail-over load balancing algorithm.
A fail-over load balancing algorithm sends all the requests of the same type to one route, the active route. The active route can be different for each type of operation, for instance route1 for ADD and route3 for BIND. Each load balancing route is assigned a priority per operation type. A priority is an integer value where 0 is the top priority. The algorithm chooses the route with the highest priority and sends all the requests of the same type to that route. When the route is down, the algorithm chooses another route with the highest priority and sends all the requests of the same type to that new route. When the first route is back on-line, the algorithm does not switch back to the first route, unless the flag "switch-back" has been set to true. In case two routes have the same priority, the algorithm chooses one and the election is not deterministic.
The Failover Load Balancing Algorithm component inherits from the Load Balancing Algorithm
A description of each property follows.
| Basic Properties: | Advanced Properties: |
|---|---|
| None | ↓ java-class |
| ↓ switch-back |
| Description | Specifies the fully-qualified name of the Java class that provides the Failover Load Balancing Algorithm implementation. |
| Default Value | com.sun.dps.server.workflowelement.loadbalancing.FailoverLoadBalancingAlgorithm |
| Allowed Values | A java class that implements or extends the class(es) : com.sun.dps.server.workflowelement.loadbalancing.AbstractLoadBalancingAlgorithm |
| Multi-valued | No |
| Required | Yes |
| Admin Action Required | None |
| Advanced Property | Yes |
| Read-only | No |
| Description | This flag tells what to do when a route is back on-line. Assuming the algorithm is using a route R2, if another route R1 is back on-line and R1 has a higher priority than R2 then the algorithm will not switch back to R1, unless the flag "switch-back" has been set to true. |
| Default Value | false |
| Allowed Values | true false |
| Multi-valued | No |
| Required | No |
| Admin Action Required | None |
| Advanced Property | Yes |
| Read-only | No |