You create an application server as a member of a configured cluster.
Why and when to perform this task
If you are migrating from a previous version of WebSphere Application
Server, you can upgrade a portion of the nodes in a cell, while leaving others
at the other release level. For a time, you might be managing servers that
are at a previous release level and servers that are running at the newer
release in the same cell. In this mixed environment, some restrictions apply
regarding what you can do with clusters and cluster members:
- You cannot create a cluster member using a server that is running on WebSphere
Application Server Version 5.x.
- You cannot add a member that is running WebSphere Application Server Version
5.x to any cluster.
- You can add a new WebSphere Application Server cluster member to a mixed
cluster, only if the cluster already contains a member that was upgraded from
WebSphere Application Server Version 5x and is running at the current release
level. All new cluster members must be running at the current release level.
To create a new cluster member, view information about existing
cluster members, or manage existing cluster members: