Replicated back-end servers

To extend scalability features to a back-end server configuration, we can replicate the back-end servers. As is the case with replicated front-end servers, replicated back-end servers must contain web spaces that are mirror images of each other. WebSEAL balances loads across the replicated servers using a least-busy scheduling algorithm. This algorithm directs each new request to the server with the fewest connections already in progress. WebSEAL also correctly fails over when a server is down and starts reusing that server after it is restarted. If the back-end application requires its state to be maintained over several pages, stateful junctions can be used to ensure that each session returns to the same back-end server.

Parent topic: Web space scalability