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Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
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What is a "reducer" in Hadoop?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
How does Mappers run method works?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
What is a Speculative Execution in Hadoop MapReduce?
In Map Reduce why map write output to Local Disk instead of HDFS?
What is mapreduce algorithm?
What are the steps involved in MapReduce framework?
Where the mapper's intermediate data will be stored?
What is a MapReduce Combiner?
What are the main configuration parameters in a MapReduce program?
Mention what is the hadoop mapreduce apis contract for a key and value class?
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