mapper or reducer?
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Explain what is the function of mapreduce partitioner?
How to write a custom partitioner for a Hadoop MapReduce job?
Explain job scheduling through JobTracker
Developing a MapReduce Application?
What is the best way to copy files between HDFS clusters?
What is Shuffling and Sorting in a MapReduce?
Why MapReduce uses the key-value pair to process the data?
Where is the output of Mapper written in Hadoop?
In Hadoop, which file controls reporting in Hadoop?
when do reducers play their role in a mapreduce task?
What is an input reader in reference to mapreduce?
Name job control options specified by mapreduce.