文档介绍：该【云计算平台虚拟机 】是由【文艺人生】上传分享，文档一共【13】页，该文档可以免费在线阅读，需要了解更多关于【云计算平台虚拟机 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。,,,-basedVirtualMachine(,anizationClusterModel,,putenodes,,,,:]:PerformanceofSystemsDesignstudies;Performanceattributes;.-works]:DistributedSystemsGeneralTerms:Design,Experimentation,Measurement,PerformanceAdditionalKeyWordsandPhrases:VirtualMachines,KVM,High-,andpurchasingtimeonanexistingclusterraisesconcernssuchasvendorlock-inanddatasecurity.(aType1(',,,,puters.[Jones2006]plishedwithaprogramcalledahypervisor,whilesystemsrunningunderahypervisorareknownasvirtualmachines([IBM2005]:,,resultinginaddedoverheadforI/,.[IBM2005],,,·-basedVirtualMachine(KVMTheKernel-basedVirtualMachine(,Inc[Habib2008][2006].KVMisbasedontheQEMUemu-,whichallowvirtualmachinestomakesystemcalls[vanDoorn2006].KVMversionsnewerthanKVM-62havesupportforparavirtualizedLinuxguests,:(anewenoughand(,XenrequiresaheavilypatchedLinuxkernel,-on-write(QCOWdiskimageformat,allowingittosupportasnapshotmodeforitsdiskI/,alldiskwritesaredirectedtoatemporaryle,'scanberunfromonediskimage,somewhatmitigatingthehugestoragerequirementsassociatedwithhostingagridofVM's[].,workingresources,makingitindistin-(ani-zationCluster(VOC,puteNodes((putefacilitiesprovidedbyaVirtualizationServiceProvider(VSPmustprovideaVMimageorsetofVMimages,'s,thecongurationofeachimagemustnotmakeanyassumptionsaboutthetworking(hardwareinterface,hostname,orsystem-,,on-gurationbaseduponthehostnameisallowed.'s,-of-the-putingappli-cationsand,alongwithitscousin,RedHatEnterpriseLinux,iswidelysupportedinthescienticandhigh-munities.'swere:putationalLogic,,,·.(1Avirtualheadnode,whichwasconguredwiththeCondorcentralmanagerandsubmitdaemons(condor_collector,condor_negotiator,condor_schedd,Gangliamonitoringdaemon(gmond,andGangliametadaemon(gmetad.(puteelement,whichwasconguredwiththeCondorjobstarter(condor_startd,MPICH2,ATLAS(tunedforthevirtualCPU,andGangliamonitoringdaemon(((asopposedtovirtualclusterforVOCsupportrequiredconguringthehostOS,settingupsupportservices,workingser-vices,,essProtocol(LDAPserverforcen-ounts,aDynamicHostCon-gurationProtocol(DHCPserverforassigningIPv4addressestonodes,andaDomainNameServer(,,,-createdquicklyincaseofaddednodes,hardwarefailure,-,IPaddress,-administeredaddressastoavoidconictswithanyotherMAC'-aware,batch,remoteadministrationtoolwasalsowrittentoaidthesystemsadministrator.'s,,-onlymodesinceKVM'ssnapshotmodewasemployedtostartseveralVM'putationalLogic,,,·(%-(%%%,:thestandardHighPerformanceLinpackbench-(HPLThefollowingHPLparameterswereoptimizedforourclusterandremainedcon-stantthroughoutthesetests:blocksize(NB,processmapping(PMAP,threshold,panelfact(PFACT,recursivestoppingcriterium(NBMIN,panelsinrecursion(NDIV's,recursivepanelfact.(RFACT's,broadcast(BCAST,lookaheaddepth(DEPTH,SWAP,swappingthreshold,L1form,Uform,Equilibration,andmem-(NwasderivedwiththeformulaN=√nDUwherenwasthenumberofnodestested,Dwasthenumberofdoublesthatcantintoasinglenode'smemory(bytesofnodememory/8,andUwastheratioofmemoryavailableforuserprocessestototalmemory(80%('--core,-