Creating clusters | WebSphere Application Server Tutorial pdf

Creating clusters

Clusters consist of one or more application servers. When you create a cluster, you can choose one existing application server to add to the cluster . The rest of the servers must be new and can be created when you create the cluster or later. When creating a cluster, it is possible to select the template of an existing application server for the cluster without adding that application server into the new cluster.
To create a new cluster:
1. Select Servers ’Clusters.
2. Click New

Enter the information for the new cluster:
– Cluster name: Enter a cluster name of your choice.
– Prefer local: This setting indicates that a request to an EJB should be routed to an EJB on the local node if available.
– Internal replication domain : Use this setting to indicate you want to use memory-to-memory replication for persistent session management and that a replication domain should be created.
- Existing server: One application server must be added to the cluster. You can choose an existing application server from the list and create new application servers for the cluster.
- If you want to use an existing server, select Select an existing server to add to this cluster and click Next. The server you select is added to the cluster and you are given the opportunity to add new servers also. If you are not using an existing server, select Do not include an existing server in this cluster and click Next.
4. The next window, allows you to add servers to the cluster. For each server, enter a name, select the appropriate parameters, and click Apply. The servers in the cluster will be listed at the bottom of the window.

– Member Name: Type a new name for the new server.
– Server weight: The value for this field determines how workload is distributed.
For example, If all cluster members have identical weights, work is distributed among the cluster members equally. Servers with higher weight values are given more work.
5. When all the servers have been entered, click Next.
6. A summary page shows you what will be created.
7. Click Finish to create the cluster and new servers.
8. Save the configuration.