Sun Java System Application Server Enterprise Edition 8.1 2005Q2 Update 2 Release Notes

Scalability

The Application Server supports horizontal scalability through clustering of server instances and request load balancing. It also achieves class leading vertical scalability supporting large multi-processor machines. The integrated message broker can be clustered for better scalability and availability. Client access from HTTP clients, RMI/IIOP based Rich Client Applications, Web Services Clients, and JRM Clients can be load balanced to Application Server clusters.