Running Business Processes and Composite Applications : Administering webMethods Process Engine : Process Engine-Related Run-Time Items : About the Process Engine and Clustered Operation
About the Process Engine and Clustered Operation
 
Operating Process Engine in an Integration Server Cluster
Operating Process Engine in Distributed Cluster Mode
Operating Process Engine in an External Cluster
In its most basic implementation, the Process Engine is installed as the WmPRT package on a single Integration Server, connected to its own Process Engine database. A webMethods Broker is also included for routing and delivering messages.
For process model development and testing purposes, or for very small process solutions, a single Process Engine, Integration Server, and webMethods Broker is adequate. However, most process solutions require more resources for efficient operation, and it is common practice to run two or more Integration Servers in one of the following configurations:
*Integration Server cluster. All Integration Server nodes share the same webMethods Broker client connection so that only one node processes a message. For details, see Operating Process Engine in an Integration Server Cluster.
*Distributed (non-clustered) mode. All Integration Server nodes have their own webMethods Broker client connection but the process model is designed so that only specific parts of the process run on any one Integration Server node. For details, see Operating Process Engine in an Integration Server Cluster.
*External cluster. This is functionally equivalent to the Integration Server cluster from a BPM perspective, except that the Integration Server nodes themselves are not part of a Integration Server cluster. Customers can chose this configuration when they do not want to use the actual Integration Server clustering feature. For details, see Operating Process Engine in an Integration Server Cluster.
For more information about working with Integration Server and webMethods Broker in a clustered environment, see these PDF publications:
* webMethods Integration Server Clustering Guide
* Administering webMethods Broker and other webMethods Broker user guides.
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