How do you stop a running job gracefully?
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What is the data storage component used by Hadoop?
Why MapReduce uses the key-value pair to process the data?
What combiners is and when you should use a combiner in a MapReduce Job?
For a job in Hadoop, is it possible to change the number of mappers to be created?
what is storage and compute nodes?
In Hadoop, which file controls reporting in Hadoop?
when do reducers play their role in a mapreduce task?
mapper or reducer?
How to change a number of mappers running on a slave in MapReduce?
what are the most common input formats defined in Hadoop?
How data is spilt in Hadoop?
How can you add the arbitrary key-value pairs in your mapper?
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