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ID:36537241
大小:3.97 MB
页数:98页
时间:2019-05-11
《分布式互联网服务故障管理》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、北京邮电大学博士学位论文分布式互联网服务故障管理姓名:禇灵伟申请学位级别:博士专业:计算机科学与技术指导教师:程时端20090501北京邮电大学博士论文摘要前窗口内先验故障概率;针对动态模型环境,基于当前窗口内原始模型和观察症状时间建立期望模型。仿真结果表明,本文算法可以有效诊断动态环境下的互联网服务故障。(4)提出了多域服务环境下的故障诊断方案。分析了多域服务环境中域间故障传播对故障诊断算法性能造成的影响。提出了多域服务环境下的分布式依赖模型,在该模型基础上提出分布式故障诊断算法,并从减小通信开销、更准确的症状引发评估函数和虚假症状概率三个方面对算法进行了改进。仿真
2、结果表明,本文算法可以有效诊断多域环境下的服务故障。关键词:分布式互联网服务,服务故障管理,故障诊断,主动探针,事件驱动算法,多域服务北京邮电大学博士论文ABSTRACTFAUIJMANAGEM匝NTFORDISTRIBUTEDINTERNETSERVICESABSTRACT0Verthelastf.ewyearS,V捌ousdistributedservicesystemsappearedi11Intemet'suchaSwebservices,IPTⅥ、厂oIPandothervalue-addedservices.Inordertomaintajnregular
3、customersa11dattractnewusers,it’snecessa叮forSPs(ServiceProVider)t0proVideQoS(Qualit),ofService)forthe打services.However,thedevices,networI(SaJldapplicationserversinVolvedmaysometinleshaVeanomalies,whichwilldegradeQoSofservicesore、,enmakeservicesunavailable.Tb母lar踟1teeQoS,SPsdesiref.0rane
4、fI’ectiveservicef.auhmanagementmechanism,whichcandeteCtthehappeningoffailures,锄alyzethecausesofthemandadoptcOuntermeasuresass00naspOssible.Thisdissertationfocusesonthef.aultmanagementarchitecture肌drelatedalgorithmsfordistributedserVices.Graphtheo眄basedf扎ltmanagement,servicemanagementmod
5、el,actiVeprobillgbasedfaultmanagement,faultdiagnosisalgorithmanalysisa11dinlproVementinbothstaticanddVn锄icseⅣicescenarios,andthemulti-domainf.aultmanagement纳me、vorkf.ordistributedservices踟.eex锄ined访thisdissertation.Themaincontributions锄.easfIollows:(1)Anservicefaultmanagementapproachbas
6、edonactiVeprobingisproposedforuncertamandnoisyenViro肌lent.Thisapproachiscomposedof铆ophases:faultdetectionandfaultdia蹲10sis.Infirstphase,weproposeag挥edyapproximationprobeselectionalgorithm(GAPSA),whichselectsaminimalsetofprobeswhileremainingahighprobabili妙off-aultdetection.Insecondphase,
7、weproposea.IⅡ.f.aultdiagnosisprobeselectionalgorithm(FDPSA),whichselectsprobestoobtainmoresysteminf0咖ationbasedonthesymptomsobservedmpreViousphase.Simulationresultsprovethevalidi锣ande伍cienCyofour印proach.(2)EVent.driVenfIaultdiagnosisalgorithmsthroughincrementalbeliefassessmenta
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