2.5. Advanced Configuration
2.5. Advanced Configuration Features such as server discovery, load balancing, failover, retry, and retry delay, may be customized if the default policy is not appropriate. Refer to the org.teiid.net.socket.ServerDiscovery interface and default implementation org.teiid.net.socket.UrlServerDiscovery for more information on customization. The UrlServerDiscovery implementation provides the following features: discovery of servers from URL hosts (including the data source server and alternative servers) random selection for load balancing and failover one connection attempt per host no biasing black listing Typically you'll want to extend the UrlServerDiscovery so that it can be used as the fall-back strategy and to only implement the necessary changed methods. It is important to consider that one ServerDiscovery instance will be created for each connection. Any sharing of information between instances should be done through static state or some other shared lookup. Your customized server discovery class must be referenced by the discoveryStrategy connection/DataSource property using its full class name.