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Help for Process Engine Administration | |
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Running the systemManaging the Process Engine involves managing the various workflow processes required for running the Process Engine. Related processes on the Application Engine or web server are discussed here as well. When a workflow application or step processor makes a request, the Process Router on the Application Engine or web server receives the request and determines the appropriate Process Engine to fulfill it. The Pooled Process Manager (PPM) on that server receives the request and allocates it to one of several VWJs server processes in an attempt to balance the load of incoming requests. After the request is fulfilled, the Process Engine returns the result via the PPM to the Process Router and then to the workflow application or step processor. The table below describes the processes involved.
The Process Service software can be configured to start automatically when the Process Engine is booted, or to allow you to manually start the Process Service software. In addition, occasionally you may need to start, restart, or stop the Process Engine manually. Note that the Process Engine documentation always indicates when you must restart the Process Engine software as part of a procedure. Use the Process Task Manager to start, restart, and stop the Process Service software on the Process Engine. You must start a Process Router on the Application Engine or web server in order for users to access the Process Engine. You can start the Process Router before or after you have started the PPM on the Process Engine. If the Process Router fails to connect to a PPM process or receives a connection error while running, the Process Router tries to reconnect to the PPM the next time the Process Router is accessed. If successful, it resets its connection information to the current PPM process. This capability allows the Process Router to recover from errors that might occur if a Process Engine is restarted at some point. Use the Process Task Manager or the Process Service Administrator to manage the Process Router. (The Process Service Administrator is not available on the Application Engine.) TIP Use the Process Service Administrator (FileNet Web Services Client or Open Client) if you want to configure the Process Router to start automatically when the web server is booted. The Pooled Process Manager (PPM) You must start the PPM in order for users to access the Process Engine. In a multi-server configuration, the PPM must be running on each server. Use the Process Task Manager or the Process Service Administrator to manage the PPM on the Process Engine. TIP Use the Process Service Administrator if you want to configure the PPM to start automatically when the Process Engine is booted.
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