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What does a 'MapReduce Partitioner' do?
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What are mapreduce new and old apis while writing map reduce program?. Explain how it works
What is optimal size of a file for distributed cache?
What is the key- value pair in Hadoop MapReduce?
Detail description of the Reducer phases?
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
How does fault tolerance work in mapreduce?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
What MapReduce framework consists of?
What is the data storage component used by Hadoop?
In Hadoop, which file controls reporting in Hadoop?
What is the key- value pair 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?
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