Compare RDBMS with Hadoop MapReduce.
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Differentiate Reducer and Combiner in Hadoop MapReduce?
What is the need of MapReduce in Hadoop?
What is RecordReader in a Map Reduce?
What are the various input and output types supported by mapreduce?
What is a "reducer" in Hadoop?
what does the conf.setMapper Class do ?
what is "map" and what is "reducer" in Hadoop?
Is YARN a replacement of Hadoop MapReduce?
What is a map side join?
How to set mappers and reducers for MapReduce jobs?
What does conf.setmapper class do?
What is difference between an input split and hdfs block?
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