Explain the differences between a combiner and reducer
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when do reducers play their role in a mapreduce task?
How to set mappers and reducers for MapReduce jobs?
What comes in Hadoop 2.0 and MapReduce V2 YARN
how to proceed to write your first mapreducer program?
What is the difference between HDFS block and input split?
Why can aggregation not be done in Mapper in MapReduce?
What is a scarce system resource?
Different ways of debugging a job in MapReduce?
What are the advantages of using mapreduce with hadoop?
Explain the general mapreduce algorithm
what is distributed cache in mapreduce framework?
What are the primary phases of a Reducer?
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