What is a partitioner and how the user can control which key will go to which reducer?
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What are ‘maps’ and ‘reduces’?
What is mapper in map reduce?
What is the fundamental difference between a MapReduce InputSplit and HDFS block?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
Explain the Reducer's reduce phase?
Explain about the partitioning, shuffle and sort phase
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Differentiate Reducer and Combiner in Hadoop MapReduce?
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A number of combiners can be changed or not in MapReduce?
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