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BigData / Hadoop MapReduce

What is Hadoop MapReduce?

MapReduce is a parallel processing framework that processes big amounts of data in-parallel on large clusters of commodity hardware in a reliable, fault-tolerant manner.

MapReduce works on master-slave architecture and can process a large amount of data by dividing the task into subtask and running parallel on commodity hardware. MapReduce works on key-value pair as shown below and uses the Java serialization package.

<key, value="some-value">

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