WebSphere Application Server V7.0: Concepts ... - IBM Redbooks

Disadvantages
The major disadvantages of this topology is increased cost. This combined
topology has the disadvantages of costs in hardware, complexity, configuration,
and administration. Consider these costs in relation to advantages in
performance, throughput, and reliability.
Note: As this topology is a combination of topologies described before, the
disadvantages of the other base topologies apply here as well.
Installation and configuration
The following sections indicate the minimum software configuration that you need
for the topology shown in Figure 5-8 on page 161:
System A, System B, System E and System F
Perform the following steps to configure System A, System B, System E and
System F.
1. Install WebSphere Edge components Load Balancer.
2. Configure the Load Balancer component according to your network topology.
Note: Keep in mind that System A and System B form one cluster and that
System E and System F form another, different cluster
System C and System D
To configure System C and System D, install and configure the Edge
Components Caching Proxy.
Note: If you plan to implement the DMZ secure proxy you would not need the
Systems G and H.
System G and System H
Perform the following steps to configure System G and System H.
1. Install and configure a supported Web server.
2. Install and configure the WebSphere Application Server Plug-in for the Web
server.
164 WebSphere Application Server V7.0: Concepts, Planning, and Design