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Hadoop - Map Reduce Application 16 pages

Application
configuration (mapred-site.xml)
Counter
Job History Server
InputFormat
Input Split
Job
Map (Mapper)
Operations (Transformations)
Partition
Pipeline
Record
Reducer
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Data (Stream) - pairs

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MapReduce - Record

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The record reader breaks the data from an input split into key/value pairs for input to the Mapper.

The key is record id.

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MapReduce - Map (Mapper)
MapReduce - Input Split

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MapReduce - Input Split

An input split is a logical representation of the data stored in file blocks. They represents the data to be processed...

MapReduce - Map (Mapper)

The Map implementation in Hadoop in a application Mapper maps input key/value pairs to a set of intermediate key/value...

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