The Central Controller

• The Central Controller is used to record and create or generate test scripts, scenarios and test data.
  
• Manages test execution and monitoring.
  
• Gathers metrics and live test run data from the load injectors.
  

• Load injectors run a compact service that execute tests under the direction of the Central Controller.
  
• Injector platforms include Windows Vista, XP and Servers (all versions).  Linux, AIX and other Unix platforms on request.
  
• The injectors service can run as a Windows service, a Unix daemon or a stand-alone process.
  
• Load injectors can be geographically dispersed, via firewalls or over the internet.
  
• A lightweight TCP/IP connection is used between the Central Controller and the injectors, hence this can be over very low-bandwidth connections.