Configuring load balancing

Use load balancing for distributing service requests from Rational® ClearQuest® Web clients across multiple WebSphere® Application Server instances that are running Rational ClearQuest Web server.

Important: WebSphere Application Server supports two types of load-balanced configurations: horizontal clustering and vertical clustering. A horizontal cluster comprises two or more physical computers. In contrast, a vertical cluster has cluster members on the same physical computer. Rational ClearQuest Web supports only horizontal clustering. In a WebSphere Application Server horizontal cluster configuration of Rational ClearQuest Web, Rational ClearQuest Web requests are distributed across all the load-balanced servers in the deployment. For more information about horizontal clustering, see the WebSphere Application Server Information Center (V8.0, V8.5).

There is extensive information about load balancing in the IBM® WebSphere Application Server help topics. Bear in mind the following points when reading those topics:

You do not need to create a profile setup for Rational ClearQuest Web (you already have one).
You do need to configure HTTP session affinity.
Although it may not be necessary in every case, it's a good idea to configure session persistence.

To configure simple load balancing using a web server plug-in configuration file, refer to the help topics that are listed below.

Configuring simple load balancing across multiple application server profiles (V8.0, V8.5)
Configuring simple load balancing across multiple application server profiles with an administrative agent (V8.0, V8.5)
Configuring simple load balancing across multiple application server profiles with an administrative agent by using a job manager (V8.0, V8.5)

For information about configuring load balancing by using the Load Balancer component of WebSphere Application Server Edge, see the next topics:

Introducing WebSphere Application Server Edge components (V8.0, V8.5)
Building a Load Balancer network (V8.0, V8.5)