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TIBCO iProcess® Engine 11.9.1

# TIBCO iProcess Engine to TIBCO iProcess Engine Network Communication in a Node Cluster

This section provides a brief overview of how TIBCO iProcess Engines communicate with each other when configured as part of a node cluster.

The only processes that communicate with each other between nodes in a cluster are the Process Managers and the SWDIR\util\swsvrmgr process. The swsvrmgr process tells the process managers what actions to perform. They communicate via the TIBCO iProcess Engine event mechanism by publishing and subscribing to events.

For example when you start the system by running SWDIR\bin\swstart, the swsvrmgr START utility publishes an event to indicate that the system needs to start some process. All the process managers on all the nodes in the cluster should receive that event and start up any processes that are configured to run on that node. Similarly on shutdown, a shutdown event is published and each machine's process manager should receive the event and shut down any appropriate processes.

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