What is the role of a MapReduce partitioner?
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What is OutputCommitter?
What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?
What is shuffling and sorting in Hadoop MapReduce?
In MapReduce, ideally how many mappers should be configured on a slave?
What is the need of key-value pair to process the data in MapReduce?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
When is it not recommended to use MapReduce paradigm for large
Clarify what is shuffling in map reduce?
List the configuration parameters that have to be specified when running a MapReduce job.
what happens when Hadoop spawned 50 tasks for a job and one of the task failed?
How to specify more than one directory as input to the MapReduce Job?
Can we submit the mapreduce job from slave node?
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