Java – What determines the number of mappers/reducers to use for a given set of specified data

What determines the number of mappers/reducers to use for a given set of specified data… here is a solution to the problem.

What determines the number of mappers/reducers to use for a given set of specified data

What are the factors that determine how many mappers and reducers to use for a given dataset for optimal performance? I’m talking about the Apache Hadoop Map Reduce platform.

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