How is reporting controlled in hadoop?
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For a Hadoop job, how will you write a custom partitioner?
how JobTracker schedules a task ?
What are the benefits of Spark over MapReduce?
What happens when a datanode fails ?
Explain the Reducer's reduce phase?
How can we assure that the values regarding a particular key goes to the same reducer?
What comes in Hadoop 2.0 and MapReduce V2 YARN
What is a partitioner and how the user can control which key will go to which reducer?
Explain how mapreduce works.
What are the steps involved in MapReduce framework?
How to set mappers and reducers for Hadoop jobs?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?