分布式流处理系统arts-sh的负载管理策略

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1、AbstractThedatastreamsystemisalwaysoverloadedattherunningtimebecausethedatastreamisunpredictable,brusty,high,continuous,andtheavailablesystemresourcesarelimited.Itleadstothesystemlatencydeterioratedandthesystemcannotprovidethetimelyresponse.Undertheseconditonsthegivenans

2、werswillhavenovalue.Soitisnecessarytoreasearchontheloadmanagementpoliciesincludingthedynamiclymovingloadpolicyandtheloadsheddingpolifyinthedistributeddatastreamsystem.AnimprovedpolicenamedbiddingloadmovingpolicyfitsourdevelopedARTs-SHsystemwasproposedbasedonanalysingthep

3、resentmovingloadpoliciesattherun-timeofthedistributeddatastreammanagementsystem.ltcanimplementmovingtheloadacrossthenodes.reducingthelatencyofthesystem.Itfitsforwidelyrange.Differentquerieshavedifferentimportanceinoursystem,however,previousloadsheddingpoliciesofthedatastr

4、eamsystemarealmostassumethatallqueriesareequallyimportant.Sotheydonotfitsforoursystem.Anewloadsheddingpolicybased-onunequalpriorityondifferentqueryisisproposed.Somemainfactorsofthequeriesareconsideredandselectedtodeterminetheprioritiesofthequery.Basedonthemtheprioritiesof

5、theinputstreamsisdetermined.Thendifferentsamplecoefficientwassettedondifferentstreams,somoreimportantqueriescanmakemoreconvincingoutputs,.TheloadsheddingpolicycanprovideagoodQoS.Theloadmanagementpolicyofthedatastreammanagementsystemwasresearched.Thebiddingloadmovingpolicy

6、andtheloadsheddingpolicybased-onunequalpriorities'querieswereproposed.Thebenefitsofthemwereconfirmedbytheoryanalysisandexperiments•Keywords:datastream;continuousquery;priorityofthequery;loadshedding;loadbalancing摘要IAbstractII1绪论1.1研究背景(1)1.2流处理系统的负载管理策略国内外研究现状(3)1.3主要研究内容

7、(5)1.4论文的结构(5)2分布式流处理系统ARTS-SH体系结构2.1分布式流处理系统ARTS-SH体系结构(7)2.2功能特性(10)2.3负载管理器模块与系统中其它模块之间的关系(10)2.4负载管理器模块的体系结构(11)2.5负载管理器模块的特性(12)2.6本章小结(13)3ARTS-SH系统的动态负载平衡策略3.1负载平衡技术(14)3.2现有的几种典型负载平衡策略(17)3.3ARTs-SH系统中的负载迁移策略(21)3.4本章小结(25)4ARTS-SH系统的降载策略4.1问题的介绍(26)4.2降载系统框架(29)4

8、.3降载策略(30)4.4实验及性能分析(35)4.5本章小结(38)5总结5.1本文的主要研究成果(39)5.2本文的不足及对未来的展望(39)致谢(41)参考文献(42)1.1研究背景1丄