Basic HTML version of Foils prepared March 4 1998

Foil 69 Execution Model for Event processing

From VRML 2 Basic Concepts and Definitions CPS616 -- Information Track of CPS -- Spring Semester 98. by Zeynep Ozdemir, Rob Baker, Meryem Ispirli, Geoffrey C. Fox
Definition and Example of Execution Model for Foil 69(Definition and Example)
1 Once a sensor or Script has generated an initial event, the event is propagated from the eventOut producing the event along any ROUTEs to other nodes.
  • These other nodes may respond by generating additional events, continuing until all routes have been honored. This process is called an event cascade.
  • All events generated during a given event cascade are assigned the same timestamp as the initial event, since all are considered to happen instantaneously.
2 Some sensors generate multiple events simultaneously. In these cases, each event generated initiates a different event cascade with identical timestamps.
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