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Clarify what combiners are and when you should utilize a combiner in a map reduce job?
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What combiners are and when you should use a combiner in a mapreduce job?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
What are the key differences between Pig vs MapReduce?
How hadoop mapreduce works?
For a Hadoop job, how will you write a custom partitioner?
A number of combiners can be changed or not in MapReduce?
What is Text Input Format?
What is Shuffling and Sorting in a MapReduce?
How to submit extra files(jars, static files) for Hadoop MapReduce job during runtime?
What are the four essential parameters of a mapper?
What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?
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