Overview


Edit Cluster page

Enterprise Manager > Cluster Manager > Edit Cluster

 

The Edit Cluster page in ColdFusion Administrator lets you define the server instances for a cluster and to customize cluster settings. For more information on sticky sessions and clustering algorithm, see the JRun 4 documentation.

 

  1. Add and remove JRun server instances by clicking the server name and the Left or Right Arrow button in the Modify Servers in Cluster area. To add or remove all JRun server instances, use the Double Arrow buttons.

  2. When you finish configuring the servers in the cluster, click Submit.

  3. (Optional) Specify a cluster algorithm.

  4. Enable or disable sticky sessions, as follows:

  5. Enable or disable session replication, as follows:

    Note: When session replication is enabled, JRun propagates session-variable information to all servers in the cluster every time a session variable changes. Consider whether the application's business requirements require session replication and whether your network incur the increased traffic before enabling session replication. You might consider using client variables instead of session variables.

  6. Click Submit.

  7. Restart the server instances.

 

The sticky sessions and session replication options require the use of J2EE Sessions by all instances participating in the cluster. To enable J2EE sessions, go to the Memory Variables page and enable the Use J2EE session variables option. You must do this for each server in the cluster.
 

Note: Do not add the JRun admin server to a cluster. Additionally, the multiserver configuration prevents you from adding the localhost cfusion server to a cluster. (Although you can add a remote cfusion server to a cluster, this is not recommended.)

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