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What is the benefit of learning MapReduce if Spark is better than MapReduce?

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Apache Spark is indeed better than MapReduce, but we should learn MapReduce first because MapReduce is a paradigm that is used by many big data tools, including Spark as well. When the data grows extremely bigger, then it is great to use MapReduce. Most tools like Pig and Hive convert their queries into MapReduce phases to optimize them better.

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