Where sorting is done on mapper node or reducer node in MapReduce?
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Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
How to optimize Hadoop MapReduce Job?
What does conf.setmapper class do?
When is it suggested to use a combiner in a MapReduce job?
How is reporting controlled in hadoop?
How to get the single file as the output from MapReduce Job?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
What is Counter in MapReduce?
What is Distributed Cache in the MapReduce Framework?
How to set which framework would be used to run mapreduce program?
Name job control options specified by mapreduce.
What is heartbeat in hdfs?
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