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