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Sybase IQ In-database MapReduce – Stock Price Variance Use Case

This document describes the MapReduce processing model, its benefits and weaknesses, and how Sybase IQ 15.4 has evolved into a platform that can execute highly distributed processing in a manner similar to MapReduce. With Sybase IQ in-database MapReduce, the developer writes programmatic “map” and “reduce” functions in C++, and invokes them from SQL. The data to be analyzed is selected and partitioned using SQL, the map and reduce functions execute within the Sybase IQ server process space, and results can be stored back into the database.

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