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1、SwitchMigrationTowardsMaximizedControlPlaneResourceUtilizationinSDNGuozhenCheng,HongchangChenNationalDigitalSwitchingSystemEngineering&TechnologicalR&DCenter,Zhengzhou,China(e-mail:guozhencheng@hotmail.com,chc@ndsc.com.cn).Abstract—DynamicControllerProvisioningProbl
2、emthosehorizontallyequalizingallcontrollers,i.e.,flat(DCPP)isakeyproblemforscalablesoftware-definedarchitecture[10]-[13],andthoseverticallylayeringfromrootnetworking(SDN).Previously,thesolutiontothisproblemcontrollertotheleafs,i.e.,hierarchicalarchitecture[14].Those
3、focusedonadaptingthenumberofcontrollersandtheirworkshavemadetremendousprogressindistributedSDN.Inlocationswithchangingnetworkconditions,butthisthoseschemes,theystaticallyconfigureeachswitchintooneapproachwillincuranumberofcommunicationcostcausedcontroller.However,ch
4、angesintheworkloadsofswitchescouldbystatesynchronization.Inmostcases,livemigratingleadtohotspotsoftheircontrollers---somecontrollersmaybeswitchesfromcontrollersthatareoverloadedtothosethatovercommitted,orcoldspots---othercontrollersmaybeareunder-utilizedmaybeasoluti
5、ontohandleaflashcrowdunderutilized.Forexample,peaktrafficindatacenternetworkofrequestswithoutre-assigningcontrollers.However,suchcoulddifferorderofmagnitudethantrafficduringpeak-migrationhastobeperformedwithawell-designedabsences[15].Thestaticconfigurationsbetweenco
6、ntrollersandmechanismtofullyutilizeavailableresourcesinallthreeswitcheshamperthemfromadaptalongwiththetrafficload.resourcedimensions:CPU,bandwidthandmemory,calledToaddressthisissue,dynamiccontrollerprovisioningSwitchMigrationProblem(SMP).Inthisarticle,wefirstproblem
7、isprovidedtobuildmorescalablerelationbetweenprovidearesourcemodelforSDN,andreduceSMPtoaswitchesandcontrollers.Previously,thesolutiontothisproblemnetworkutilizationproblem,atypicalcombinationalfocusedonadaptingthenumberofcontrollersandtheirproblem.Second,byproperlyap
8、proximatingSMPwithalocationswithchangingnetworkconditions,evenre-placingthelog-sum-expfunction,asynthesizingdistributedalgorithmiscontrolp
