【摘要】：全球經(jīng)濟(jì)已進(jìn)入后工業(yè)革命時(shí)代,即信息革命時(shí)代。信息數(shù)據(jù)作為這場(chǎng)革命重要的載體,具有越來(lái)越重要的意義。企業(yè)和個(gè)人在日常經(jīng)濟(jì)生活中產(chǎn)生了大量的信息數(shù)據(jù),這些數(shù)據(jù)都需要保存在儲(chǔ)存系統(tǒng)當(dāng)中。隨著數(shù)據(jù)量的爆炸增長(zhǎng),存儲(chǔ)系統(tǒng)的不斷增大,系統(tǒng)越大,多塊磁盤(pán)同時(shí)損壞的可能性也越大,系統(tǒng)的可靠性顯得越加重要。美國(guó)911恐怖事件,日本海嘯等大型人為自然災(zāi)害,讓人們更加深刻地認(rèn)識(shí)到災(zāi)難對(duì)數(shù)據(jù)的毀滅性損害,更加重視系統(tǒng)的容災(zāi)能力。目前存儲(chǔ)系統(tǒng)的編碼布局方案多集中于單冗余或二冗余存儲(chǔ),為滿足日益增長(zhǎng)的需求,研究多冗余網(wǎng)絡(luò)存儲(chǔ)系統(tǒng)顯得十分必要。 本文著重于存儲(chǔ)系統(tǒng)可靠性,提出了一種新型的基于iSCSI兩級(jí)RAID分布式高可靠存儲(chǔ)系統(tǒng),此系統(tǒng)具有極好的可靠性,亦可避免地震等災(zāi)害對(duì)數(shù)據(jù)造成的不可恢復(fù)損害。本文闡述了主流RAID技術(shù)的優(yōu)缺點(diǎn),對(duì)目前主流的NAS、SAN和IP-SAN技術(shù)進(jìn)行了分析,特別是IP-SAN中的iSCSI技術(shù)。 主要工作分為以下兩個(gè)方面： 1.提出了基于新的存儲(chǔ)結(jié)構(gòu)的系統(tǒng),兩級(jí)RAID高可靠分布式iSCSI存儲(chǔ)系統(tǒng),重點(diǎn)建立了基于馬爾可夫過(guò)程的數(shù)學(xué)模型。模型復(fù)雜,狀態(tài)多,根據(jù)兩級(jí)RAID系統(tǒng)的特性,利用Matlab符號(hào)計(jì)算,計(jì)算得出系統(tǒng)可靠性,論證了兩級(jí)RAID系統(tǒng)具有極高的數(shù)據(jù)可靠性,極大優(yōu)于以往的系統(tǒng)。 2.利用Linux實(shí)現(xiàn)了實(shí)驗(yàn)系統(tǒng)的搭建,利用IOMeter測(cè)試工具,測(cè)試了兩級(jí)RAID分布式高可靠存儲(chǔ)系統(tǒng)的數(shù)據(jù)讀寫(xiě)性能,測(cè)試了系統(tǒng)并發(fā)性,并通過(guò)實(shí)驗(yàn)分析條帶單元、子節(jié)點(diǎn)帶寬、條帶組合對(duì)系統(tǒng)性能的影響,最后闡述了兩級(jí)RAID系統(tǒng)可應(yīng)用領(lǐng)域。與其他系統(tǒng)相比,該系統(tǒng)兼具良好讀寫(xiě)性能,高可靠性和分布式異地存儲(chǔ)三個(gè)優(yōu)點(diǎn),具有高可靠性與高容災(zāi)能力。
[Abstract]:The global economy has entered the post-industrial revolution era, that is, the information revolution era. As an important carrier of this revolution, information data has more and more important significance. Enterprises and individuals generate a lot of information data in their daily economic life, which need to be stored in the storage system. With the explosion of data and the increasing of storage system, the larger the system is, the more likely it is that multiple disks will be damaged at the same time. The reliability of the system becomes more and more important. The September 11th terrorist event in the United States, the Japanese tsunami and other large-scale man-made natural disasters have made people more deeply aware of the devastating damage to the data caused by the disaster and pay more attention to the disaster tolerance ability of the system. At present, the coding layout of storage system is mostly focused on single or double redundant storage. In order to meet the increasing demand, it is necessary to study the multi-redundancy network storage system. This paper focuses on the reliability of storage system, and proposes a new distributed high reliability storage system based on iSCSI two-level RAID. This system has excellent reliability and can avoid the unrecoverable damage caused by earthquake and other disasters to data. This paper describes the advantages and disadvantages of the mainstream RAID technology, and analyzes the current mainstream NASSAN and IP-SAN technologies, especially the iSCSI technology in IP-SAN. The main work is divided into the following two aspects: 1. Based on a new storage structure, a two-level RAID high reliability distributed iSCSI storage system is proposed, and a mathematical model based on Markov process is established. The model is complex and has many states. According to the characteristics of the two-stage RAID system, the system reliability is calculated by using the Matlab symbol calculation. It is proved that the two-stage RAID system has extremely high data reliability, which is much better than the previous system. 2. The experiment system is built with Linux, and the data reading and writing performance of two-level RAID distributed high reliability storage system is tested by using IOMeter test tool. The system co-generation is tested, and the band unit and bandwidth of sub-nodes are analyzed by experiment. The effect of strip combination on system performance is discussed. Finally, the application field of two-stage RAID system is described. Compared with other systems, the system has three advantages, such as good read and write performance, high reliability and distributed remote storage, and has high reliability and disaster tolerance.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP333

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