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Considerations for large topologies
WebSphere® Application Server cells larger than 50 WebSphere JVMs, application servers, node agents, deployment managers, or proxy servers must take the following factors into consideration as part of the planning and deployment process.
- IBM_CS_WIRE_FORMAT_VERSION to 6.1.0 and IBM_CS_HAM_PROTOCOL_VERSION to 6.0.2.31. For more information see, Core group protocol versions.
- IBM_CS_OOM_ACTION=Isolate be set. See SERVER FAILS TO START WITH CWRLS0030W DUE TO OUT OF MEMORY CONDITION IN ANOTHER PROCESS IN CELL for setting information.
Additional information and options for deploying and managing large WebSphere Application Server cells is detailed in Best Practices for Large WebSphere Topologies, which are applicable to all currently supported versions of WebSphere Application Server.
Starting in WebSphere Application Server - Network Deployment V8.5.5 the following Intelligent Management functions are enabled by default: Routing Rules, Dynamic Load-balancing, Health Management, Application Editions, and Dynamic Clustering. These Intelligent Management functions require more memory and CPU usage, depending on the number of JVMs and nodes in the cell. If you do not want to use the Intelligent Management function, or do not want to incur any increased memory requirements or CPU utilization, you can set the LargeTopologyOptimization custom property to false. Setting this custom property reduces the overall cell memory and CPU utilization. For more information see, Cell custom properties.