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Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
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how JobTracker schedules a task ?
What is a TaskInstance?
List the configuration parameters that have to be specified when running a MapReduce job.
In MapReduce Data Flow, when Combiner is called?
What is a map side join?
Why comparison of types is important for MapReduce?
How does MapReduce framework view its input internally?
Explain task granularity
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What is the difference between map and reduce?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
what is "map" and what is "reducer" in Hadoop?
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