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What is the problem with the small file in Hadoop?
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What main configuration parameters are specified in mapreduce?
What is the purpose of textinputformat?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
How does MapReduce framework view its input internally?
How many times combiner is called on a mapper node in Hadoop?
When should you use a reducer?
What is partitioner and its usage?
What is Reduce only jobs?
For a job in Hadoop, is it possible to change the number of mappers to be created?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
How to set mappers and reducers for MapReduce jobs?
Explain about the partitioning, shuffle and sort phase
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