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Question:Explain what you understand by speculative execution


Mapreduce works on the basis of large number of computers connected via a network also known as node. In a large network there is always a possibility that a system may not perform as quickly as others. This results in a task being delayed. By speculative execution this can be avoided as multiple instances of the same map are run on different systems.
asked Sep 13, 2013 in Cloud-Computing by rajesh
edited Sep 12, 2013
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