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1、MapReduceDesignPatternsDonaldMinerandAdamShookMapReduceDesignPatternsbyDonaldMinerandAdamShookCopyright©2013DonaldMinerandAdamShook.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Rei
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3、ndMikeHendricksonProofreader:DawnCarelliProductionEditor:ChristopherHearseCoverDesigner:RandyComerInteriorDesigner:DavidFutatoIllustrator:RebeccaDemarestDecember2012:FirstEditionRevisionHistoryfortheFirstEdition:2012-11-20FirstreleaseSeehttp://oreilly.com/catalog/er
4、rata.csp?isbn=9781449327170forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.MapReduceDesignPatterns,theimageofPèreDavid’sdeer,andrelatedtradedressaretrademarksofO’ReillyMedia,Inc.Manyofthedesigna
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6、ionofthisbook,thepublisherandauthorsassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcontainedherein.ISBN:978-1-449-32717-0[LSI]ForWilliamTableofContentsPreface.................................................................
7、......ix1.DesignPatternsandMapReduce...............................................1DesignPatterns2MapReduceHistory4MapReduceandHadoopRefresher4HadoopExample:WordCount7PigandHive112.SummarizationPatterns.....................................................13Numerica
8、lSummarizations14PatternDescription14NumericalSummarizationExamples17InvertedIndexSummarizations32PatternDescription32InvertedIndexExample