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How many instance of record reader will run for a specific map reduce job?

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How many instance of record reader will run for a specific map reduce job?

New Contributor

For a specific map reduce job how many instances of record reader will run ?

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Re: How many instance of record reader will run for a specific map reduce job?

New Contributor

The number of instance of record readers will be equal to the number of input splits( the number of mappers).


In the parallel processing, mappers will run parallelly and each mapper will create an instance of the mapper.