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1、華中科技大學碩士學位論文光纖通道交換機數(shù)據(jù)交換系統(tǒng)的設(shè)計與仿真姓名:曹雷申請學位級別:碩士專業(yè):光電信息工程指導(dǎo)教師:徐軍2011-01-05華中科技大學碩士學位論文摘要由于具有數(shù)據(jù)統(tǒng)一存儲、數(shù)據(jù)共享和遠程數(shù)據(jù)容災(zāi)等優(yōu)點,存儲區(qū)域網(wǎng)絡(luò)被廣泛應(yīng)用于高端的、企業(yè)級的存儲系統(tǒng)中。光纖通道交換機作為存儲區(qū)域網(wǎng)絡(luò)的核心設(shè)備,在存儲區(qū)域網(wǎng)絡(luò)中起著十分重要的作用,已成為國內(nèi)外的研究熱點。本文深入分析了存儲區(qū)域網(wǎng)絡(luò)的體系結(jié)構(gòu)及光纖通道標準,設(shè)計出了光纖通道交換機的邏輯結(jié)構(gòu),其底層物理層為線卡和數(shù)據(jù)交換系統(tǒng),上層管理層為線卡
2、控制器和主控制器。根據(jù)光纖通道交換機的邏輯結(jié)構(gòu),詳細設(shè)計了光纖通道交換機的數(shù)據(jù)交換系統(tǒng),設(shè)計分為路由查找模塊、虛擬輸出隊列、輸入仲裁器、帶緩存的Crossbar交換結(jié)構(gòu)和輸出仲裁器5部分。路由查找模塊采用了CAM+RAM的結(jié)構(gòu),能夠為輸入數(shù)據(jù)快速定位輸出端口號,降低了數(shù)據(jù)交換系統(tǒng)的延遲性能;虛擬輸出隊列和帶緩存的Crossbar交換結(jié)構(gòu)通過FIFO來實現(xiàn),能夠簡化地址管理問題,降低系統(tǒng)復(fù)雜度;輸入仲裁器采用RR_LQD調(diào)度算法,在各種均勻和非均勻網(wǎng)絡(luò)流量下都具有較高的吞吐量和較低的系統(tǒng)時延;輸出仲裁器采用R
3、oundRobin調(diào)度算法,與輸入仲裁器中的RR_LQD調(diào)度算法配合使用可以實現(xiàn)數(shù)據(jù)的無阻塞交換。為了驗證該設(shè)計的正確性,將各功能模塊組合成一個完整的數(shù)據(jù)交換系統(tǒng),并對整個數(shù)據(jù)交換系統(tǒng)進行了功能仿真,仿真結(jié)果表明該數(shù)據(jù)交換系統(tǒng)能滿足光纖通道交換機的需要,并能應(yīng)用于光纖通道交換機中。關(guān)鍵詞:存儲區(qū)域網(wǎng)絡(luò)光纖通道光纖通道交換機線卡數(shù)據(jù)交換系統(tǒng)I華中科技大學碩士學位論文AbstractBecauseofadvantageofitsdataunifiedstorage,datasharingandremotedat
4、atolerant,StorageAreaNetworkiswidelyappliedinhigh-endandenterprise-levelstoragesystem.TheFibreChannelswitchisusedasthecoreequipmentofstorageareanetwork,playsaveryimportantroleintheStorageAreaNetwork,andhasbecomethedomesticandforeignresearchhotspot.Thispape
5、rdeeplyanalyzesthearchitectureofStorageAreaNetworkandFibreChannelstandard,designsthelogicstructureofFibreChannelswitch.Thelow-levelphysicallayeroflogicstructureismadeupoflinecardanddataexchangesystem,andtheuppermanagementlayerincludesthecontrolleroflinecar
6、dandthemaincontroller.AccordingtothelogicstructureofFibreChannelswitch,wedesignthedataexchangesystemofFibreChannelswitchindetail.Theschemeshowsthatthedataexchangesystemconsistsoftheroutingforwardingengine,thevirtualoutputqueue,theinputarbiter,thebufferedcr
7、ossbarswitchingfabricandtheoutputarbiter.TheroutingforwardingengineismadeupofCAMandRAM,itcanquicklylocateaoutputportnumberforinputdata,andcanreducethetimedelayofdataexchangesystem.ThevirtualoutputqueueandbufferedcrossbarswitchingfabricareimplementedbyFIFO,
8、itsimplifiestheaddressmanagementofdataexchangesystem,andreducesthesystemcomplexity.InputarbiteradoptstheRR_LQDschedulingalgorithm,andcanachieve100%throughputandlowdelayundervariousuniformandnon-uniformtraffic