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1、MapReduceDesignPatternsDonaldMinerandAdamShookMapReduceDesignPatternsbyDonaldMinerandAdamShookCopyright©2013DonaldMinerandAdamShook.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmaybepurchasedforeduc
2、ational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:800-998-9938orcorporate@oreilly.com.Editors:AndyOramandMikeHendricksonProofreader:DawnCarelliProductionEditor:C
3、hristopherHearseCoverDesigner:RandyComerInteriorDesigner:DavidFutatoIllustrator:RebeccaDemarestDecember2012:FirstEditionRevisionHistoryfortheFirstEdition:2012-11-20FirstreleaseSeehttp://oreilly.com/catalog/errata.csp?isbn=9781449327170forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,a
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6、N:978-1-449-32717-0[LSI]ForWilliamTableofContentsPreface.......................................................................ix1.DesignPatternsandMapReduce...............................................1DesignPatterns2MapReduceHistory4MapReduceandHadoopRefresher4HadoopExample:WordCount7Pigand
7、Hive112.SummarizationPatterns.....................................................13NumericalSummarizations14PatternDescription14NumericalSummarizationExamples17InvertedIndexSummarizations32PatternDescription32InvertedIndexExample
