Sun Java System Reference Configuration Series: Portal Service on Application Server Cluster

Scalability in the Deployment Architecture

The modular nature of the reference configuration's deployment architecture means that you can scale each module independently, depending on the kind of traffic that your portal service receives.

Each service module in the deployment architecture is composed of two or more service instances running on separate computers behind a load balancer. This architecture allows you to scale any of the modules vertically (by adding CPUs or memory to the host computers) or horizontally (by adding additional service instances). Some modules are better suited to vertical scaling, and some modules are better suited to horizontal scaling.

The recommended techniques for scaling each module in the reference configuration are as follows: