The following example shows how to extend a Directory Proxy Server's configuration to use a Criteria Based Load Balancing Algorithm to route all write requests to a single server using a Failover Load Balancing Algorithm. The approach outlined here can easily be extended to support alternate criteria as well as more complex topologies using multiple locations or Entry Balancing.
This example uses a simple deployment of a Directory Proxy Server fronting three Directory Servers: ds1.example.com, ds2.example.com, and ds3.example.com.
Once these configurations changes are applied, the Directory Proxy Server will route all write operations to ds1.example.com as long as it is available and then to ds2.example.com if it is not, while routing other types of operations, such as searches and binds, to all three servers using the Fewest Operations Load Balancing Algorithm.