You can modify the stream data processing engine that is used for current operations by changing the contents of the definition files shown below.

Definition file to be changed	Section
JavaVM options file for SDP servers (jvm_options.cfg)	8.4
System configuration property file (system_config.properties)	8.6
Log file output property file (logger.properties)	8.10

To change a definition file:

1. Use the sdpstop command to shut down the SDP server.
   For details about how to shut down the SDP server, see 4.4.4 Shutting down the SDP server.
   
2. Change the contents of the definition files.
3. Use the sdpstart command to start the SDP server.
   For details about how to start the SDP server, see 4.2.1 Starting the SDP server.