[programming.pig：dataflow.scripting.with.hadoop(2011.9)].alan.gates.文字版

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1、ProgrammingPigAlanGatesBeijing•Cambridge•Farnham•Köln•Sebastopol•TokyoProgrammingPigbyAlanGatesCopyright©2011Yahoo!,Inc.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmaybep

2、urchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:(800)998-9938orcorporate@oreilly.com.Editors:MikeLoukidesandMeghanBla

3、nchetteIndexer:JayMarchandProductionEditor:AdamZarembaCoverDesigner:KarenMontgomeryCopyeditor:Genevieved’EntremontInteriorDesigner:DavidFutatoProofreader:MarloweShaefferIllustrator:RobertRomanoOctober2011:FirstEdition.RevisionHistoryfortheFirstEdition:2011-09-27Firstr

4、eleaseSeehttp://oreilly.com/catalog/errata.csp?isbn=9781449302641forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.ProgrammingPig,theimageofadomesticpig,andrelatedtradedressaretrademarksofO’ReillyMe

5、dia,Inc.Manyofthedesignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’ReillyMedia,Inc.wasawareofatrademarkclaim,thedesignationshavebeenprintedincapsorinitialcaps.Whileeveryprecautionhasbe

6、entakeninthepreparationofthisbook,thepublisherandauthorassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcon-tainedherein.ISBN:978-1-449-30264-1[LSI]1317137246Tomywife,Barbara,andourboys,AdamandJoel.Theirsupport,encouragement,an

7、dsacri-ficedSaturdayshavemadethisbookpossible.TableofContentsPreface.....................................................................ix1.Introduction...........................................................1WhatIsPig?1PigonHadoop1PigLatin,aParallelDataflowLangua

8、ge4WhatIsPigUsefulFor?7PigPhilosophy9Pig’sHistory102.InstallingandRunningPig..............................................11