What is the need of key-value pair to process the data in MapReduce?
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How to set the number of reducers?
When the reducers are are started in a mapreduce job?
What does a 'MapReduce Partitioner' do?
What is MapReduce?
What is a "reducer" in Hadoop?
How to overwrite an existing output file during execution of mapreduce jobs?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
What does a split do?
What is RecordReader in a Map Reduce?
How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?
what is "map" and what is "reducer" in Hadoop?
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