Use MapReduce in Hadoop to perform a word count on the specifieddataset.
Answer
Hi, Below is the MapReduce Program for WordCount in Java:
How MapReduceWorks:
MapReduce decomposes large manipulation jobs into individualtasks that can be executed in parallel across a cluster of servers.The results of tasks can be joined together to compute finalresults. It consists of two Steps:
1. Map Function: Breaks down the element into Tuples.
2. Reduce Function: Takes the output from Map as an input andcombines those tuples into a smaller set of tuples.
In the below example, the program reads an input file and countsthe frequency of words. The WordCountMapper class
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