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List out Hadoop's three configuration files?
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What are ‘reduces’?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
Explain what does the conf.setMapper Class do in MapReduce?
How to set which framework would be used to run mapreduce program?
Explain Working of MapReduce?
In Hadoop what is InputSplit?
What is the role of a MapReduce partitioner?
How to set mappers and reducers for Hadoop jobs?
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?
Where sorting is done on mapper node or reducer node in MapReduce?
When should you use sequencefileinputformat?
what are the basic parameters of a Mapper?
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