Working with Portal Server Building Modules
SRA includes other Java technology processes called Netlet Proxy and Rewriter Proxy. You use these proxies to extend the security perimeter from behind the firewall, and limit the number of holes in the DMZ. You can install these proxies on separate nodes.
Working with Portal Server Building Modules
Because deploying Portal Server is a complex process involving many other systems, this section describes a specific configuration that provides optimum performance and horizontal scalability. This configuration is known as a Portal Server building module.
A Portal Server building module is a hardware and software construct with limited or no dependencies on shared services. A typical deployment uses multiple building modules to achieve optimum performance and horizontal scalability. Figure
Figure 5-2 Portal Server Building Module Architecture
Portal
Server Instance
Directory
Server
Master
Replica
Search
Engine
Database
NOTE The Portal Server building module is simply a recommended configuration. In some cases, a different configuration might result in slightly better throughput (usually at the cost of added complexity). For example, adding another instance of Portal Server to a four CPU system might result in up to ten percent additional throughput, at the cost of requiring a load balancer even when using just a single system.
Chapter 5 Creating Your Portal Design 89
