资源描述:
《基于信任机制的网格资源调度》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要由于网格系统动态性、自治性、分布性和异构性等特点,使得网格环境下的资源调度十分复杂和具有挑战性。目前,多数网格资源调度仅仅考虑到性能的一些参数,而忽视了信任的影响。首先,本文概述了网格的基本概念、技术特点及分类,介绍了网格的体系结构,分析了网格资源调度的目标和资源调度算法的研究现状,并指出了各自的优缺点。其次,结合网格的特点,提出了一种新的网格信任机制,该信任机制分为行为信任模型和能力信任两部分。其中行为信任模型采取了以自治域为单位,分层次的结构,这样既能不改变原有的资源管理形式,又能达到资源共
2、享。在行为信任的基础上,结合网格动态变化的特点,提出了能力信任,完善了信任机制。再次,通过对Min-min算法的分析,提出了一种信任驱动的资源调度算法TDS。该算法与Min-min算法相比,在保证性能QoS的同时兼顾了信任QoS,减少了恶意的用户和不实的资源,从而减少调度失败的次数,提高调度效率。最后,采用GidSim仿真软件对TDS和Min-min算法及另一种基于信任QoS的算法进行比较。关键词网格环境;行为信任;能力信任;信任驱动;资源调度万方数据AbstractGridSystemconsis
3、tsofvariousresources,andtheresourceshavemorefeaturesofdynamicchange,autonomy,geiographicaldipersionandhetergeneoussystems,whichmakeschedulingofresourcesverycomplexandchallenging.Atpresent,mostofschedulingingridonlyconcernsomeschedulingperformanceparame
4、ters,andlargelyingoretheimpactoftrustmechnism.Firstly,grid'sbasicconception,technologycharacteristicandgrid'ssortsarereviewed.Thearchitectureofgridsystemisintroduced.Theaimofschedule-ngandschedulingalgorithmsareanalysedandtheiradvantageanddisadvantagea
5、repointed.Secondly,concerningthegrid'scharacteristic,anewtrustmechnism,whichcompisebehaviortrustmodelandcapabilitytrust,isproposed.Thebehaviortrustmodelwithtwolayersisunitedbydomain,thisarchitecturenotonlyneedn’tchangetheformofresourcemanagement,butals
6、ocansharetheresources.Basedonbehaviortrustandconcernedgrid'sdynamicchange,capa-bilitytrustwhichmakeupthebehaviortrust,isproposed.Thirdly,AnewtrustdrivenresourceschedulingalgorithmTDSisproposedbyananlysingMin-minalgorithm.TDSnotonlyfocusonperformanceQoS
7、butalsopayattentiontotrustQoS,besidesreducethevicioususersandresources,accordinglyreducethefailingtimesandinhancetheschedulingefficiency.Finally,theperformanceofTDS,Min-minandTDMin-minarecomparedwithGridSim.KeywordsGridenvironment;Behaviortrust;Capabil
8、itytrust;Trustdriven;Reso-urcescheduling万方数据目录摘要ABSTRACT第1章绪论...........................................................11.1研究的背景和意义................................................11.2研究现状................................................