Explain what are the basic parameters of a mapper?
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Explain Working of MapReduce?
How to optimize Hadoop MapReduce Job?
How to set which framework would be used to run mapreduce program?
Explain what are the basic parameters of a mapper?
How to set the number of mappers to be created in MapReduce?
What is the key- value pair in Hadoop MapReduce?
How do you stop a running job gracefully?
Can MapReduce program be written in any language other than Java?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
How to set mappers and reducers for Hadoop jobs?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?