Explain about the partitioning, shuffle and sort phase in MapReduce?
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What are the configuration parameters in the 'MapReduce' program?
Can you tell us how many daemon processes run on a hadoop system?
Explain about the partitioning, shuffle and sort phase
How to compress mapper output in Hadoop?
Can we set the number of reducers to zero in MapReduce?
What is the Job interface in MapReduce framework?
What are the advantages of using mapreduce with hadoop?
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
When should you use sequencefileinputformat?
How many Mappers run for a MapReduce job?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
What main configuration parameters are specified in mapreduce?
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