Explain what combiners are and when you should use a combiner in a mapreduce job?
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mapper or reducer?
What do you understand by compute and storage nodes?
What can be optimum value for Reducer?
what job does the conf class do?
What happen if the number of the reducer is 0 in MapReduce?
Explain combiners.
Why comparison of types is important for MapReduce?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
Clarify what combiners are and when you should utilize a combiner in a map reduce job?
What is Reduce only jobs?
List out Hadoop's three configuration files?
Explain the Reducer's Sort phase?