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This document explores advanced features of the MapReduce framework, focusing on the use of Combiners and Multiple Input Formats. It highlights the utilization of a local reducer to optimize data processing. The configuration example, `conf.setCombinerClass(LongSumReducer.class);`, showcases how to effectively reduce the volume of data transfer between the Mapper and Reducer phases. Understanding these features can significantly improve the efficiency of big data applications, allowing for faster computations and better resource management.
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-- Nagarjunak Map Reduce nagarjuna@outlook.com
More Features • Combiner • Counters • MultipleInputFormat nagarjuna@outlook.com
Combiner • A local reducer • conf.setCombinerClass(LongSumReducer.class); nagarjuna@outlook.com