An approach to reducing delays in recognizing distributed event occurrences
Madalene Spezialetti · 1991
In order to aid in analyzing the activity of distributed computations, monitoring systems have been developed which allow a user to specify behavior of interest in the form of an event definition.The monitoring system then analyzes the behavior of the computation, notifying the user when the computation exhibits the behavior described by a definition.To accomplish such an analysis, the activity of the components of an event must be monitored individually and information pertaining to their values sent to a designated monitor for evaluation.Due to the need to accumulate state information, delays often result between the occurrence of activity specified by an event definition and the detection of the activity by the monitoring system.This paper presents an approach to reducing delays in event recognition by incorporating knowledge about the characteristics of the behavior to be recognized int #e % evaluation protocol.These characteristics are use in the development of techniques to localize information required for event recognition at the place of evaluation, thus decreasing the impact of communication delays on the recognition task and leading to a reduction in the time which elapses between an event's occurrence and its recognition.