Explain job scheduling through JobTracker
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Clarify what combiners are and when you should utilize a combiner in a map reduce job?
what are the basic parameters of a Mapper?
what is storage and compute nodes?
How to optimize MapReduce Job?
What is the data storage component used by Hadoop?
What is LazyOutputFormat in MapReduce?
How is reporting controlled in hadoop?
Mention Hadoop core components?
Is it necessary to write a mapreduce job in java?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
What is a "map" in Hadoop?
Can you tell us how many daemon processes run on a hadoop system?
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