Explain Working of MapReduce?
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What is Counter in MapReduce?
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?
How do Hadoop MapReduce works?
Explain the Reducer's reduce phase?
What are the identity mapper and reducer in MapReduce?
How can we assure that the values regarding a particular key goes to the same reducer?
What is Data Locality in Hadoop?
What is a "reducer" in Hadoop?
how indexing in HDFS is done?
Explain the process of spilling in Hadoop MapReduce?
What is the core of the job in MapReduce framework?
What combiners are and when you should utilize a combiner in a map reduce job?
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