If your domain is not configured to support clustering, and you require to use clustering features of Application Server, add cluster support to the domain. For example, a domain that is running a developer profile is not configured to support clustering. Use the Admin Console Application Server node General tab to upgrade the domain to support clustering.
The implications of adding cluster support to a domain are as follows:
The domain.xml file of the domain is modified to support clustering. The modifications include, for example, the addition of system properties and changes to the template configuration. Only the domain.xml file is modified. All other files in the domain's directory are left unchanged.
The server will support both clusters and standalone server instances.
By default, in-memory replication will be used for applications that are required to be highly available.
All the applications that are currently deployed on the server will continue to work.
This change will take effect after the server is restarted and, if CLI multimode is running, after the asadmin CLI is restarted.
To enable you to revert the domain to its original configuration if necessary, back up the domain.xml file of the domain.
Because the administration server will support clusters after the upgrade, consider enhancing JVM settings such as heap-size.
The Admin Console displays a message that indicates that a restart is required.
The Admin Console displays that the application domain has been shutdown.
The common tasks page now includes cluster-related tasks, indicating that the domain now supports clustering features.