【摘要】：虛擬磁帶庫(kù)，該技術(shù)概念早在十多年前就已經(jīng)出現(xiàn)，但一直沒有被普遍使用。直到最近幾年，，磁盤系統(tǒng)的成本越來(lái)越低，可靠性越來(lái)越高，業(yè)界開始越來(lái)越多的使用這個(gè)技術(shù)。這個(gè)技術(shù)逐漸成為行業(yè)未來(lái)的發(fā)展方向。 隨著計(jì)算機(jī)技術(shù)的快速發(fā)展，政府日�；顒�(dòng)所產(chǎn)生的系統(tǒng)數(shù)據(jù)日益增多，因此，數(shù)據(jù)備份量也就不斷增長(zhǎng),現(xiàn)有的自動(dòng)磁帶庫(kù)已經(jīng)無(wú)法滿足需求，因此，政府容災(zāi)備份系統(tǒng)的性能的提高就變得迫在眉睫，舊有的機(jī)械磁帶庫(kù)已經(jīng)無(wú)法勝任這種任務(wù)，政府電子政務(wù)系統(tǒng)需要的是接近于在線存儲(chǔ)的方式進(jìn)行數(shù)據(jù)備份，而物理磁帶庫(kù)只能滿足離線存儲(chǔ)的設(shè)計(jì)要求，因此，如何提高政府電子政務(wù)系統(tǒng)在崩潰時(shí)的數(shù)據(jù)恢復(fù)能力和數(shù)據(jù)備份水平就成了整個(gè)系統(tǒng)改造的核心工作。 在本課題的研究過程中，虛擬磁帶庫(kù)系統(tǒng)結(jié)構(gòu)是一個(gè)三層結(jié)構(gòu),分別是主機(jī)層、虛擬帶庫(kù)層和自動(dòng)磁帶庫(kù)層。基于三層架構(gòu)的虛擬磁帶庫(kù)容災(zāi)系統(tǒng)在傳統(tǒng)的兩級(jí)備份架構(gòu)中增加了虛擬帶庫(kù)層，虛擬帶庫(kù)層其實(shí)是一個(gè)近線存儲(chǔ)層，該層的特點(diǎn)是數(shù)據(jù)備份速度近似于在線存儲(chǔ)，而設(shè)備價(jià)格又接近離線海量存儲(chǔ)，本文通過對(duì)現(xiàn)有電子政務(wù)系統(tǒng)的深入研究，對(duì)政府電子政務(wù)容災(zāi)系統(tǒng)的發(fā)展現(xiàn)狀進(jìn)深入分析，對(duì)其在現(xiàn)有條件下應(yīng)用中表現(xiàn)出的不足之處以及現(xiàn)有系統(tǒng)的海量數(shù)據(jù)存儲(chǔ)的核心技術(shù)等方面進(jìn)行深入研究分析，最后總結(jié)了電子政務(wù)系統(tǒng)基于VTL的容災(zāi)系統(tǒng)的預(yù)期效果以及整個(gè)系統(tǒng)的改造目標(biāo)，從而進(jìn)一步驗(yàn)證了虛擬磁帶庫(kù)技術(shù)在容災(zāi)系統(tǒng)的應(yīng)用相對(duì)于物理磁帶庫(kù)的優(yōu)勢(shì)。 本課題研究的政府容災(zāi)系統(tǒng)是在傳統(tǒng)兩層的備份體系結(jié)構(gòu)中加入虛擬磁帶庫(kù)后，主機(jī)和備機(jī)的災(zāi)難互備系統(tǒng)的恢復(fù)點(diǎn)目標(biāo)控制在兩分鐘內(nèi)，即在兩分鐘內(nèi)實(shí)時(shí)地備份主機(jī)系統(tǒng)業(yè)務(wù)信息中的每一個(gè)數(shù)據(jù)操作事務(wù)，在最大程度上減免了數(shù)據(jù)的丟失。從根本上達(dá)到了災(zāi)難自動(dòng)恢復(fù)的機(jī)制要求,保證了數(shù)據(jù)恢復(fù)時(shí)間指標(biāo)控制在兩小時(shí)內(nèi)，因此，即使出現(xiàn)災(zāi)難或者意外狀況，主機(jī)數(shù)據(jù)都可以實(shí)現(xiàn)在兩個(gè)小時(shí)內(nèi)從備機(jī)恢復(fù)，以保證備機(jī)的正常運(yùn)行。 虛擬磁帶庫(kù)技術(shù)是近些年來(lái)發(fā)展起來(lái)的適用于海量數(shù)據(jù)備份的新型技術(shù)，虛擬磁帶庫(kù)技術(shù)在容災(zāi)系統(tǒng)的應(yīng)用尤為突出，它具有備份速度快，數(shù)據(jù)恢復(fù)時(shí)間短的特性，主要備份領(lǐng)域，克服了傳統(tǒng)的物理磁帶庫(kù)的缺點(diǎn),對(duì)數(shù)據(jù)備份存儲(chǔ)領(lǐng)域的發(fā)展具有重大意義。
[Abstract]:Virtual tape library, the concept of this technology has been around more than a decade ago, but has not been widely used. Until recently, the cost and reliability of disk systems were getting lower and higher, and the industry began to use the technology more and more. This technology is gradually becoming the future development direction of the industry. With the rapid development of computer technology, the system data generated by the daily activities of the government is increasing day by day. Therefore, the amount of data backup is also increasing, and the existing automatic tape library can no longer meet the demand. It is urgent to improve the performance of the government disaster recovery backup system. The old mechanical tape library is no longer competent for this kind of task. What the government e-government system needs is data backup in a way close to online storage. The physical tape library can only meet the design requirements of off-line storage. Therefore, how to improve the ability of data recovery and the level of data backup in the collapse of government e-government system becomes the core task of the whole system reform. In the course of this research, the virtual tape library system structure is a three-layer structure, which is the host layer, the virtual tape library layer and the automatic tape library layer. Virtual tape library disaster recovery system based on three-layer architecture adds virtual tape library layer to the traditional two-level backup architecture. Virtual tape library layer is actually a near-line storage layer. The characteristic of this layer is that the speed of data backup is similar to that of online storage. And the equipment price is close to off-line mass storage. Through the in-depth study of the existing e-government system, this paper makes a deep analysis of the development status of the government e-government disaster recovery system. The shortcomings of its application under the existing conditions and the core technology of mass data storage in the existing system are deeply studied and analyzed. Finally, the paper summarizes the expected effect of the disaster recovery system based on VTL and the reform goal of the whole system, which further verifies the advantage of the virtual tape library technology in disaster recovery system compared with the physical tape library. The government disaster recovery system studied in this paper is to add virtual tape library to the traditional two-tier backup system structure, and the recovery point of the disaster mutual backup system of host and standby machine is controlled within two minutes. In other words, every data operation transaction in the business information of the host system can be backed up in two minutes in real time, and the loss of data is reduced to the greatest extent. It basically meets the requirements of the mechanism for automatic disaster recovery and ensures that the data recovery time index is controlled within two hours. Therefore, even if a disaster or an accident occurs, the host data can be recovered from the standby machine within two hours. To ensure the normal operation of the standby machine. Virtual tape library technology is a new technology suitable for mass data backup developed in recent years. The application of virtual tape library technology in disaster recovery system is particularly prominent. It has the characteristics of fast backup speed and short data recovery time. The main backup field overcomes the shortcomings of the traditional physical tape library and is of great significance to the development of the data backup storage field.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TP309.3;TP333.35

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