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Word Count Program using Hadoop and Java | MapReduce
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In MapReduce word count example, we find out the frequency of each word. Here, the role of Mapper is to map the keys to the existing values and the role of Reducer is to aggregate the keys of common values. So, everything is represented in the form of Key-value pair.
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Pre-requisite
Java Installation - Check whether the Java is installed or not using the following command.
java -version
Hadoop Installation - Check whether the Hadoop is installed or not using the following command.
hadoop version
If any of them is not installed in your system, follow the below link to install it.
------------------------------------------------------------------------
-----------------------------------------------------------------------
----------------------------------------------------------------------
Pre-requisite
Java Installation - Check whether the Java is installed or not using the following command.
java -version
Hadoop Installation - Check whether the Hadoop is installed or not using the following command.
hadoop version
If any of them is not installed in your system, follow the below link to install it.
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