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1、摘要由于網(wǎng)格系統(tǒng)動態(tài)性、自治性、分布性和異構(gòu)性等特點，使得網(wǎng)格環(huán)境下的資源調(diào)度十分復(fù)雜和具有挑戰(zhàn)性。目前，多數(shù)網(wǎng)格資源調(diào)度僅僅考慮到性能的一些參數(shù)，而忽視了信任的影響。首先，本文概述了網(wǎng)格的基本概念、技術(shù)特點及分類，介紹了網(wǎng)格的體系結(jié)構(gòu)，分析了網(wǎng)格資源調(diào)度的目標(biāo)和資源調(diào)度算法的研究現(xiàn)狀，并指出了各自的優(yōu)缺點。其次，結(jié)合網(wǎng)格的特點，提出了一種新的網(wǎng)格信任機(jī)制，該信任機(jī)制分為行為信任模型和能力信任兩部分。其中行為信任模型采取了以自治域為單位，分層次的結(jié)構(gòu)，這樣既能不改變原有的資源管理形式，又能達(dá)到資源共
2、享。在行為信任的基礎(chǔ)上，結(jié)合網(wǎng)格動態(tài)變化的特點，提出了能力信任，完善了信任機(jī)制。再次，通過對Min-min算法的分析，提出了一種信任驅(qū)動的資源調(diào)度算法TDS。該算法與Min-min算法相比，在保證性能QoS的同時兼顧了信任QoS，減少了惡意的用戶和不實的資源，從而減少調(diào)度失敗的次數(shù)，提高調(diào)度效率。最后，采用GidSim仿真軟件對TDS和Min-min算法及另一種基于信任QoS的算法進(jìn)行比較。關(guān)鍵詞網(wǎng)格環(huán)境；行為信任；能力信任；信任驅(qū)動；資源調(diào)度萬方數(shù)據(jù)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萬方數(shù)據(jù)目錄摘要ABSTRACT第1章緒論...........................................................11.1研究的背景和意義................................................11.2研究現(xiàn)狀................................................
