October 2013
Beginner to intermediate
244 pages
5h 53m
English
Content preview from Joe Celko’s Complete Guide to NoSQL
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Chapter 4
MapReduce Model
Abstract
The MapReduce model was developed by Google and Yahoo for their internal use. Google created the Hadoop distributed file system and Yahoo developed Pig Latin to handle their volume of data. These products became open source. Hadoop dominates the NoSQL market as part of the SMAQ stack, the NoSQL counterpart of the LAMP stack for websites. The process has two phases: mapping and reducing. The mapping phase gets the data in a parallelized fashion. The reduce phase filters and aggregates this data to produce a final result.
Keywords
ETL (extract transform load); Google; Hadoop; HDFS (Hadoop distributed file system); LAMP stack; MapReduce; Pig Latin; RAID storage systems; SMAQ stack; Yahoo
Introduction
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