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1、ISSN1000-9825,CODENRUXUEWE-mail:jos@iscas.ac.cnJournalofSoftware,Vol.20,No.5,May2009,pp.1337?1348http://www.jos.org.cndoi:10.3724/SP.J.1001.2009.03493Tel/Fax:+86-10-62562563?byInstituteofSoftware,theChineseAcademyofSciences.Allrightsreserved.?云計算:系統(tǒng)實例與
2、研究現(xiàn)狀1,2+1,2陳康,鄭緯民1(清華大學(xué)清華信息科學(xué)與技術(shù)國家實驗室(籌),北京100084)2(清華大學(xué)計算機科學(xué)與技術(shù)系,北京100084)CloudComputing:SystemInstancesandCurrentResearch1,2+1,2CHENKang,ZHENGWei-Min1(TsinghuaNationalLaboratoryforInformationScienceandTechnology,TsinghuaUniversity,Beijing100084,China
3、)2(DepartmentofComputerScienceandTechnology,TsinghuaUniversity,Beijing100084,China)+Correspondingauthor:E-mail:ck99@mails.tsinghua.edu.cnChenK,ZhengWM.Cloudcomputing:Systeminstancesandcurrentresearch.JournalofSoftware,2009,20(5):1337?1348.http://www.jo
4、s.org.cn/1000-9825/3493.htmAbstract:Thispapersurveysthecurrenttechnologiesadoptedincloudcomputingaswellasthesystemsinenterprises.Cloudcomputingcanbeviewedfromtwodifferentaspects.Oneisaboutthecloudinfrastructurewhichisthebuildingblockfortheuplayerclouda
5、pplication.Theotherisofcoursethecloudapplication.Thispaperfocusesonthecloudinfrastructureincludingthesystemsandcurrentresearch.Someattractivecloudapplicationsarealsodiscussed.Cloudcomputinginfrastructurehasthreedistinctcharacteristics.First,theinfrastr
6、uctureisbuiltontopoflargescaleclusterswhichcontainalargenumberofcheapPCservers.Second,theapplicationsareco-designedwiththefundamentalinfrastructurethatthecomputingresourcescanbemaximallyutilized.Third,thereliabilityofthewholesystemisachievedbysoftwareb
7、uildingontopofredundanthardwareinsteadofmerehardware.Allthesetechnologiesareforthetwoimportantgoalsfordistributedsystem:highscalabilityandhighavailability.Scalabilitymeansthatthecloudinfrastructurecanbeexpandedtoverylargescaleeventothousandsofnodes.Ava
8、ilabilitymeansthattheservicesareavailableevenwhenquiteanumberofnodesfail.Fromthispaper,readerswillcapturethecurrentstatusofcloudcomputingaswellasitsfuturetrends.Keywords:cloudcomputing;distributedinfrastructure;distributedparadigm摘要:針對云
