How can I develop and execute a Map Reduce on Hadoop?

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To process the huge volume of data in Hadoop cluster MapReduce framework is used. MapReduce is a framework which is written in Java. To get meaningful information from the data you have to write code in terms of map and reduce logic. Map phase performed parallelly on different nodes where as reduce phase...
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To process the huge volume of data in Hadoop cluster MapReduce framework is used. MapReduce is a framework which is written in Java. To get meaningful information from the data you have to write code in terms of map and reduce logic. Map phase performed parallelly on different nodes where as reduce phase aggregates the output from different map phase. Map and Reduce phase is driven by the Driver code. MapReduce code can be written in Java, C++, Ruby, and Python. I am a Hortonworks certified Hadoop Developer. http://bcert.me/swfssczm read less
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