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

Disadvantages
Horizontal scaling using clusters has the following disadvantages:
► Increased resources used
As multiple systems are required to implement this topology, the hardware
cost will increase.
To implement vertical scaling you need WebSphere Application Server
Network Deployment. Therefore, you need additional application server
processes like the deployment manager and the node agent process to
manage such an environment. This increases overhead and the memory
footprint of the installation.
► More complex administration
The maintenance and administration of the environment are more complex as
the number of systems increases.
Installation and configuration
The following sections indicate the minimum software configuration steps that
you need to perform for the topology shown in Figure 5-4 on page 147:
System A
Perform the following steps to configure System A.
1. Install and configure a supported Web server.
2. Install and configure the WebSphere Application Server Plug-in for the Web
server.
System B and System C
Perform the following steps to configure System B and System C.
1. Install WebSphere Application Server V7.0.
2. Create an application server profile using the
/profileTemplates/managed profile template and federate
this profile to the deployment manager on system D either during profile
creation or by running the addNode command after the profile creation.
Alternatively, you can create an application server profile using the
/profileTemplates/default profile template and federate the
node to the deployment manager running on System D by using the addNode
command.
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