Why is Apache Spark faster than Hadoop MapReduce?
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what are the main configuration parameters that user need to specify to run Mapreduce Job ?
Is it possible to split 100 lines of input as a single split in MapReduce?
What is RecordReader in a Map Reduce?
What is the difference between Hadoop and RDBMS?
Define speculative execution?
What is shuffling in mapreduce?
How to submit extra files(jars, static files) for MapReduce job during runtime?
In MapReduce Data Flow, when Combiner is called?
What is the input type/format in MapReduce by default?
What main configuration parameters are specified in mapreduce?
What are the four basic parameters of a reducer?
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
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