You can make changes to the system during operation by using definition files and commands. The system modifications that can be made are as follows:

• Modifying the stream data processing engine
  You can change information about the stream data processing engine that is being used for current operations.
  
• Modifying query groups
  You can change information about the query groups that are being used for current operations.
  
• Modifying adaptors
  You can change information about the adaptors that are being used for current operations.
  
• Modifying the dashboard
  If you use a dashboard to display stream data summary analysis results, you can change settings, such as the configuration of the Dashboard Viewer windows. You can also cancel the registration of Dashboard Server.