What combiners is and when you should use a combiner in a MapReduce Job?
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What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
In MapReduce how to change the name of the output file from part-r-00000?
what are the three modes in which Hadoop can be run?
Clarify what is shuffling in map reduce?
What is a "reducer" in Hadoop?
How to create a custom key and custom value in MapReduce Job?
How is reporting controlled in hadoop?
What is a "map" in Hadoop?
How does inputsplit in mapreduce determines the record boundaries correctly?
Explain combiners.
Why is output file name in Hadoop MapReduce part-r-00000?
What are the main components of MapReduce Job?