Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
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Answer / Abhinav Kukreti
No, MapReduce does not inherently provide a way for reducers to directly communicate with each other. Each reduce task operates independently and in parallel. However, advanced MapReduce implementations such as Hadoop YARN may support job-level communication between tasks using custom application-specific mechanisms.
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