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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?
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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?
What are combiners? When should I use a combiner in my MapReduce Job?
What is the Hadoop MapReduce API contract for a key and value Class?
For a job in Hadoop, is it possible to change the number of mappers to be created?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
Why comparison of types is important for MapReduce?
mapper or reducer?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
how JobTracker schedules a task ?
Why Mapreduce output written in local disk?
List the configuration parameters that have to be specified when running a MapReduce job.
Explain job scheduling through JobTracker
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