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What happens when a datanode fails ?
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Why MapReduce uses the key-value pair to process the data?
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Name job control options specified by mapreduce.
What are ‘reduces’?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
How hadoop mapreduce works?
What do sorting and shuffling do?
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What happens when a datanode fails ?
What is the need of key-value pair to process the data in MapReduce?
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what is JobTracker in Hadoop? What are the actions followed by Hadoop?
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