What counter in Hadoop MapReduce?
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How to compress mapper output in Hadoop?
How can we control particular key should go in a specific reducer?
What is the difference between Hadoop and RDBMS?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
What is the need of key-value pair to process the data in MapReduce?
How to set mappers and reducers for MapReduce jobs?
What is partitioning in MapReduce?
Is it necessary to write a mapreduce job in java?
What are the advantages of using mapreduce with hadoop?
What is heartbeat in hdfs? Explain.
what happens in textinformat ?
what does the text input format do?