what is distributed cache in mapreduce framework?
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what daemons run on a master node and slave nodes?
How to set mappers and reducers for Hadoop jobs?
What are the four essential parameters of a mapper?
Why do we need MapReduce during Pig programming?
What is identity mapper and identity reducer?
what are the three modes in which Hadoop can be run?
Explain about the partitioning, shuffle and sort phase
Compare Pig vs Hive vs Hadoop MapReduce?
What is the relationship between Job and Task in Hadoop?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
What is the need of MapReduce in Hadoop?
How do ‘map’ and ‘reduce’ work?
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