[wiki:Documentation]
| !NodeHandler

= Node Handler =

The nodehandler is the central experiment controller. A central '''NodeHandler''' process communicates with '''NodeAgents''', one on each active node in the testbed.  The '''NodeHandler''' is hosted on one of the testbed's utility servers.  Applications are loaded and executed by a '''NodeAgent''' on instructions from the '''NodeHandler'''.  These instructions will also include the initial property settings for the applications.


  * [wiki:Documentation/NodeHandler/Commands Available Commands]
  * [wiki:Documentation/NodeHandler/LogS Logging]

== Internal Design Issues (should go somewhere else) ==


Communication between the '''NodeHandler''' and each of its '''NodeAgents''' uses the Control Internet port.  Default settings leave the Data Internet port unconfigured and require the experimenter to specifically configure it through the '''NodeHandler''' if it is to be used during the experiment.  


  * [wiki:Documentation/NodeHandler/GridService Backward Compatibility]
  * [wiki:Documentation/NodeHandler/Broadcast Reliable Communication]