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1、Cassandra:TheDefinitiveGuideCassandra:TheDefinitiveGuideEbenHewittBeijing•Cambridge•Farnham•Köln•Sebastopol•TokyoCassandra:TheDefinitiveGuidebyEbenHewittCopyright©2011EbenHewitt.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebas
2、topol,CA95472.O’Reillybooksmaybepurchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:(800)998-9938orcorporate@oreilly.com.Editor:MikeLoukidesIndex
3、er:EllenTroutmanZaigProductionEditor:HollyBauerCoverDesigner:KarenMontgomeryCopyeditor:Genevieved’EntremontInteriorDesigner:DavidFutatoProofreader:EmilyQuillIllustrator:RobertRomanoPrintingHistory:November2010:FirstEdition.NutshellHandbook,theNutshellHandbooklogo,andtheO’Reillylogoareregister
4、edtrademarksofO’ReillyMedia,Inc.Cassandra:TheDefinitiveGuide,theimageofaParadiseflycatcher,andrelatedtradedressaretrademarksofO’ReillyMedia,Inc.Manyofthedesignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’Reilly
5、Media,Inc.wasawareofatrademarkclaim,thedesignationshavebeenprintedincapsorinitialcaps.Whileeveryprecautionhasbeentakeninthepreparationofthisbook,thepublisherandauthorassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcon-tainedherein.TMThisbookusesRepKov
6、er™,adurableandflexiblelay-flatbinding.ISBN:978-1-449-39041-9[M]1289577822Thisbookisdedicatedtomysweetheart,AlisonBrown.Icanhearthesoundofviolins,longbeforeitbegins.TableofContentsForeword...................................................................xvPreface.............................
7、.......................................xvii1.IntroducingCassandra...................................................1What’sWrongwithRelationalDatabases?1AQuickReviewofRelationalDatabases6RDBMS:TheAwesomeandtheNot-So-Much6WebScale12TheCassandr