what does the text input format do?
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What is the core of the job in MapReduce framework?
Explain what does the conf.setMapper Class do in MapReduce?
Is there any point of learning mapreduce, then?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
how Hadoop is different from other data processing tools?
What are the various configuration parameters required to run a mapreduce job?
When Namenode is down what happens to job tracker?
How do Hadoop MapReduce works?
How to set mappers and reducers for Hadoop jobs?
What are the four essential parameters of a mapper?
Illustrate a simple example of the working of MapReduce.
How does fault tolerance work in mapreduce?
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