Enable EJB workload management
EJB workload management high availability is achieved by a combination of WAS ND server cluster support and the ORB WLM plug-in, which is bundled with IBM WAS ND V6.x.
EJB WLM is not available in WAS V6 or WAS - Express V6, since these are single server environments.
In IBM WAS ND V6, workload management for EJBs is enabled automatically when a cluster is created. No special configuration is needed to enable EJB WLM on the server.
The WLM plug-in in the ORB takes the responsibility of dispatching the load among the appservers (cluster members) of the cluster.
IBM WAS ND V6.x uses the concept of cell, cluster, and cluster members (Workload management using WebSphere clustering) to identify which appservers participate in workload management. Requests from clients are distributed among the cluster members' EJB containers within the cluster.
The following types of EJB clients can participate in EJB WLM automatically:
- Clients in the same appserver (servlets, JSPs, EJBs)
- Clients in a different appserver (servlets, JSPs, EJBs)
- Java applications running within a WebSphere client container
- Stand-alone Java applications using the WebSphere-supplied JRE
The WebSphere-supplied JRE is required for remote Java clients.