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《對(duì)象存儲(chǔ)系統(tǒng)中數(shù)據(jù)通道的設(shè)計(jì)與實(shí)現(xiàn)》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、華中科技大學(xué)碩士學(xué)位論文對(duì)象存儲(chǔ)系統(tǒng)中數(shù)據(jù)通道的設(shè)計(jì)與實(shí)現(xiàn)姓名:張偉申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):計(jì)算機(jī)系統(tǒng)結(jié)構(gòu)指導(dǎo)教師:王芳20080605華中科技大學(xué)碩士學(xué)位論文摘要*隨著數(shù)字信息的爆炸式增長(zhǎng)和應(yīng)用需求的不斷提高,傳統(tǒng)的網(wǎng)絡(luò)存儲(chǔ)系統(tǒng)在容量、性能、可擴(kuò)展性、安全性、服務(wù)質(zhì)量等方面面臨著巨大挑戰(zhàn),對(duì)象存儲(chǔ)技術(shù)采用全新的對(duì)象接口,被認(rèn)為是下一代網(wǎng)絡(luò)存儲(chǔ)技術(shù)的標(biāo)準(zhǔn)。設(shè)計(jì)高效的對(duì)象存儲(chǔ)系統(tǒng),使其能充分發(fā)揮對(duì)象存儲(chǔ)技術(shù)的優(yōu)勢(shì),以滿足日益增長(zhǎng)的海量數(shù)據(jù)存儲(chǔ)需求已成為新的研究熱點(diǎn)。對(duì)象存儲(chǔ)系統(tǒng)由元數(shù)據(jù)服務(wù)器、對(duì)象存儲(chǔ)設(shè)備、客戶端文件系統(tǒng)和互連網(wǎng)絡(luò)
2、四部分組成。對(duì)象存儲(chǔ)系統(tǒng)中客戶端文件系統(tǒng)和對(duì)象存儲(chǔ)設(shè)備之間的通信所經(jīng)由的數(shù)據(jù)通道是影響整個(gè)系統(tǒng)性能的關(guān)鍵之一,其包括二者之間通信所采用的傳輸協(xié)議及其內(nèi)部采用的緩沖策略。通過研究原有對(duì)象系統(tǒng)HOSS關(guān)鍵部分的運(yùn)行機(jī)制,采用更細(xì)粒度的緩沖策略和開源的UNHiSCSI協(xié)議傳輸模塊對(duì)HOSS系統(tǒng)中的數(shù)據(jù)通道及緩沖層進(jìn)行重新設(shè)計(jì)與實(shí)現(xiàn)。通過與對(duì)象存儲(chǔ)系統(tǒng)HOSS改進(jìn)前后的讀/寫性能對(duì)比的結(jié)果表明,改進(jìn)后的系統(tǒng)寫性能在文件大小為512K時(shí)提高最大,提高了1.65倍;讀性能在文件大小為256M時(shí)提高最大,提高了85%。通過測(cè)試還分析了包長(zhǎng)度和
3、OSD數(shù)量對(duì)系統(tǒng)讀寫性能的影響。另外還提出了相關(guān)算法和思想用于解決HOSS系統(tǒng)存在的緩存一致性問題。關(guān)鍵詞:對(duì)象存儲(chǔ),互聯(lián)網(wǎng)小型計(jì)算機(jī)系統(tǒng)接口、緩沖策略,緩存一致性*本文的研究工作受國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)資助項(xiàng)目(2004CB318201),湖北省自然科學(xué)基金資助項(xiàng)目武漢市科技計(jì)劃(20061002031,200750730307)資助I華中科技大學(xué)碩士學(xué)位論文Abstract*Withexplosivegrowthofthedigitalinformationandcontinuousimprovementof
4、applicationrequirements,thetraditionalnetworkstoragesystemsfaceahugechallengeincapacity,performance,scalability,security,qualityofserviceandso.ObjectStorageTechnology,whichusesanewinterfaceobjects,isconsideredasthenextgenerationnetworkstoragetechnologystandards.Ithas
5、becomeanewhotspotthathowtodesignanefficientObjectStorageTechnologysystems,whichcangivefullplaytotheadvantagesofobjectstoragetechnologytomeetthegrowingneedsofthemassdatastorage.TheObjectStorageTechnologysystemsisformedbyfourparts:MDS,OSD,ClientandtheInternet.IntheObje
6、ctStorageSystems,thedatachannel,wherethecommunicationsbetweenthefilesystemofClientandOSDgothrough,isoneofthekeyswhichaffectsthewholesystemperformance,whichincludingthetransmissionprotocolusedbythecommunicationsbetweenthetwoandthebufferstrategyofinternaluse.Afterresea
7、rchingoperatingmechanismofkeypartofHOSS,weuseasmallergranularityofbufferstrategyandrevenueUNHiSCSIprotocolmodulestore-designandimplementthedatachannelandthebuffer.ThecomparisonresultsofthebetweentheObjectStorageSystemsbeforeandaftertheHOSSimprovingshows,theimprovedsy
8、stemperformanceinthewritingincreased1.65timesofthelargestwhenfilesizeis52KB,asthereadingincreaseof85%whenfilesizeis256MB.ItAlsocomp