MapReduce Cloud Computing Interview Question:

Can you explain what you understand by speculative execution?

Submitted by: Administrator

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.
Submitted by: Administrator