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SSS Mapreduce Programming Guide - Basic Concept
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Updated Feb 27, 2013 by tatsuhik...@gmail.com

Basic Concept

First, this chapter explains basic concepts which is required to user SSS Mapreduce.

TupleGroup

Key/value store records key-value pairs in flat space normaly. but when key-value pairs is recorded in flat space, Inconveniences, like input and output of the data processing are undistinguishable and the output of a certain data processing and the output of another data processing are undistinguishable occur. Thus, storage server of SSS Mapreduce groups and records key-value pairs. The group is called "TupleGroup". And a key/value pair in "TupleGroup" is called "Tuple".

In data processing of SSS Mapreduce, the flows, reading !Tuple from storage servers, execution of the processing of TupleGroup and writing the result as another TupleGroup to storage server, is foundation.

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