Explain how mapreduce works.
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Map reduce jobs take too long. What can be done to improve the performance of the cluster?
What does a split do?
What is map/reduce job in hadoop?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
Explain about the basic parameters of mapper and reducer function
What is an input reader in reference to mapreduce?
How to optimize Hadoop MapReduce Job?
how to proceed to write your first mapreducer program?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
Explain InputSplit in Hadoop MapReduce?
Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?
how JobTracker schedules a task ?
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