4.3.1 Server Clustering Procedure
Clustering support in Enterprise Manager is based on server-side load distribution. A Proxy/Load-Balancer application serves as the sole interface to all clients, and manages the communication to individual server instances (cluster nodes).
The recommended cluster configuration is shown below. Note that the Load Balancer can be installed on the same physical machine as Node 1 if desired.
Figure 4. A Load Balanced Cluster

To set up a clustered environment, follow the steps below:
1. Install Node 1, containing the Repository servlet and Administration servlet. See Installing Node 1 for Repository and Admin Servlets.
2. Install Node 2 to Node N. See Installing Additional Nodes for Repository Servlets.
3. Install the Load Balancer. See Installing the Load Balancer Proxy.
4. Define the cluster nodes in Enterprise Manager. See Defining the Cluster Nodes.
All cluster nodes share a common repository directory which is specified as a context parameter in the deployment descriptor file (web.xml).
See Also
Distributed Materialization in a Clustered Environment, for details on Viewsheet materialization.
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