Asked On2017-06-07 08:03:41 by:metaphor

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Examples An application area for the Master-slave pattern is tolerance: the master delegates the job to be done to several slaves, receives their results, and applies a strategy to decide which result to return to the client. One possible strategy is to choose the result from the first slave that terminates. Another strategy is to choose the result that the majority of slaves have computed. This is fail-proof with respect to slaves (the master can provide a valid result as long as not all slaves fail), but not with respect to the
master. Failure of slaves may be detected by the master using time-outs. Failure of the master means the system as a whole fails. Another application are parallel computing: The master divides a complexl ask into a number of identical subtasks. An example is matrix computation: each row in the product matrix can be computed by a separate slave. A third application area is that of computational accuracy. The execution of a service is delegated to different slaves, with at least three different implementations. The master waits for the results, and applies a strategy for choosing the best result ( for instance the average, or the majority).

                                                               
Contributed by, Satya Shiromani

Answerd on:2018-06-07 Answerd By:satyashiromani

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