Integrate Software AG Products Using Digital Event Services 10.4 | Integrate Software AG Products Using Digital Event Services | MashZone NextGen Help | Appendix | Administration | MashZone NextGen Server Administration | Deploying MashZone NextGen Instances, Clusters or Artifacts | Clustering MashZone NextGen Servers | Adding New Members to an Existing Cluster
 
Adding New Members to an Existing Cluster
* To add additional MashZone NextGen Servers to an existing cluster
1. Install the MashZone NextGen Server. See Installing Software AG Products for instructions.
2. Configure the MashZone NextGen Server to use the shared MashZone NextGen Repository for the cluster. See Share an Existing MashZone NextGen Repository for instructions.
3. If the cluster has a shared external configuration folder, add this folder and any subfolders to the classpath for the MashZone NextGen Server’s application server to enable access to this shared configuration.
Depending on your application server, you may update the classpath in the administration console, in configuration files or in the startup script for the application server. See documentation for your application server for more information.
4. If the cluster does not have a shared external configuration folder, copy the configuration and extension files from an existing MashZone NextGen Server in the cluster to the new MashZone NextGen Server.
See MashZone NextGen File-Based Configuration and Extensions for a list of files and folders to copy.
5. Copy the server configuration that cannot be shared from an existing MashZone NextGen Server in the cluster to the new MashZone NextGen Server. See MashZone NextGen File-Based Configuration and Extensions for details on the files and locations for this step.
6. Update the application server that hosts the new MashZone NextGen Server with the same cluster configuration as other cluster members.
In addition to the basic cluster configuration required by your application server and load balancer, MashZone NextGen has a single requirement for application-layer cluster configuration. You must either:
*Enable session replication in each application server in the cluster.
*Enable session affinity, sometimes also called ’sticky sessions,’ in the load balancer.
*Or do both.
See documentation for your application server and/or load balancer for information on how to do this.
7. Restart the new MashZone NextGen Server.
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