What combiners is and when you should use a combiner in a MapReduce Job?
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Why can aggregation not be done in Mapper in MapReduce?
How to set which framework would be used to run mapreduce program?
What is optimal size of a file for distributed cache?
What are the various input and output types supported by mapreduce?
what is the Hadoop MapReduce APIs contract for a key and value class?
When is it not recommended to use MapReduce paradigm for large scale data processing?
Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?
What are the identity mapper and reducer in MapReduce?
How to get the single file as the output from MapReduce Job?
What is RecordReader in a Map Reduce?
What are the data components used by Hadoop?
What is the difference between map and reduce?
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