基于改进蚁群算法的云计算任务调度策略的研究

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1、杭州电子科技大学硕士学位论文3.考虑到云环境的多样性、云规模的差异性，为了让PSO_ACO算法更具适应性，第四章从最优解的分布状态入手，对原有算法的信息素更新规则进行改进，完成了自适应PSO_ACO算法的设计，最后通过实验表明这种自适应调度算法具有比PSO_ACO更好的全局搜索最优解的能力和使资源负载均衡能力。关键词：云计算，任务调度，负载均衡，蚁群算法，自适应II杭州电子科技大学硕士学位论文ABSTRACTCloudcomputingisaEmergingtechnologywhichisdevelopedfro

2、mgridcomputing,distributedcomputationandparallelcomputing.Itmakesthetraditionalservicemodehaschangedalot.CloudcomputingisanewbusinessmodebycombiningwiththeInternettechnology.Atpresent,resourcesunderthecloudcomputingenvironmentmainlyreferstothevirtualresource,V

3、irtualresourcepoolisformedbyvirtualizationofhardwareresourcesindatacenter.Thendynamicdeploymentofthevirtualmachineisappliedintheresourcepool.Userscanusetheseresourceswhicharetransparenttousers.Theusersubmitstaskstoexecutiononresources.Buttheydonotknowthespecif

4、iclocationoftheexecution.Intheresearchofcloudcomputing,taskschedulingandresourceallocationisoneofthehotissues.Thedynamic,heterogeneous,autonomousofCloudcomputingandtheuseofvirtualizationtechnologydeterminesthetaskschedulingincloudcomputing.Resourceallocationme

5、thod,incloudcomputingisdifferentfromgridcomputing,distributedcomputingandparallelcomputing.Withtheexpansionofthescaleofthedatacenterandincreasingofthenumberofusers,Itbecomestheimportantproblemofthecloudcomputingresourceschedulingthathowtomakethevirtualmachiner

6、esourcestoobtaintheeffectiveuseandmeettheQoSrequirementofusertask.Therefore,researchofvirtualmachineresourceallocationincloudcomputing,andtaskschedulingproblemhasimportantsignificanceforthedevelopmentofcloudcomputing.ResourcesschedulingofvirtualmachineinCloudc

7、omputingmainlystudieshowtoallocatethevirtualresourcestousertasks，andcanmeettheuser'sQoSrequirementswithresourceutilizationimprovingandthecomputationtimereducing，forthepurposeofwithoutviolatingtheservicelevelagreement(ServiceLevelAgreement,SLA).Thispapermainlys

8、tudiesthetaskschedulingincloudcomputingenvironment.Basedonthepreviouswork,themainworkandinnovationsofthispaperincludethefollowing:1.Thispaperanalysisofthecurrentdevelopmenttrendofc