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What is a partitioner and how the user can control which key will go to which reducer?
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How many Mappers run for a MapReduce job in Hadoop?
What is a TaskInstance?
When is it not recommended to use MapReduce paradigm for large
how to proceed to write your first mapreducer program?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
What are advantages of Spark over MapReduce?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
Can we submit the mapreduce job from slave node?
How to set mappers and reducers for MapReduce jobs?
What is an identity mapper and identity reducer?
What is a "reducer" in Hadoop?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
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