發(fā)布時(shí)間：2015-02-02 17:16

北京理工大學(xué)工程碩士學(xué)位論文開題報(bào)告

一、學(xué)位論文（設(shè)計(jì)）選題的目的和意義

1. 本選題研究領(lǐng)域歷史、現(xiàn)狀、發(fā)展趨勢分析

本課題在分析了分布式文件備份技術(shù)的國內(nèi)外的研究現(xiàn)狀的基礎(chǔ)上，對文件備份的需求進(jìn)行了較為系統(tǒng)的分析。針對文件備份與存儲(chǔ)的安全性問題給出了采用分布式系統(tǒng)以及P2P技術(shù)，設(shè)計(jì)和實(shí)現(xiàn)文件備份與恢復(fù)系統(tǒng)的具體方法。實(shí)現(xiàn)后的系統(tǒng)能自動(dòng)監(jiān)測用戶文件的新建與修改，自動(dòng)與對等端進(jìn)行通信并管理網(wǎng)絡(luò)上在線主機(jī)的信息，自動(dòng)進(jìn)行文件備份以及根據(jù)用戶需求恢復(fù)文件。針對用戶數(shù)據(jù)機(jī)密性以及安全性的問題，在用戶數(shù)據(jù)發(fā)送前，對數(shù)據(jù)使用RC4算法進(jìn)行加密，并且對收到的其它主機(jī)備份來的文件進(jìn)行寫保護(hù)操作，保證了用戶數(shù)據(jù)的機(jī)密性以及安全性。
目前市場上的分布式系統(tǒng)，大部分都針對文件存取性能及穩(wěn)定性的需求設(shè)計(jì)與構(gòu)建，其構(gòu)建成本都非常高。目前企業(yè)對于文件空間需求量越來越多樣化，不僅系統(tǒng)儲(chǔ)存容量需求越來越大，系統(tǒng)也必須具備不間斷的服務(wù)能力。而要達(dá)到上述兩項(xiàng)目標(biāo)，勢必花費(fèi)相當(dāng)多的維護(hù)成本；因此如何用較低的成本構(gòu)建一個(gè)分布式文件系統(tǒng)并滿足動(dòng)態(tài)調(diào)整儲(chǔ)存空間的需求，且兼顧分布式文件系統(tǒng)的性能與延展性、文件可靠性是目前分布式文件系統(tǒng)相當(dāng)重要的研究議題。
基于P2P的分布式存儲(chǔ)具有無可比擬的優(yōu)點(diǎn)，已經(jīng)成為當(dāng)前分布式存儲(chǔ)的大趨勢。自然災(zāi)害的發(fā)生，，軟件的缺陷、硬件的故障以及誤操作、電腦病毒、黑客非法攻擊等都有可能導(dǎo)致數(shù)據(jù)丟失，對數(shù)據(jù)進(jìn)行備份以及根據(jù)備份數(shù)據(jù)快速的進(jìn)行恢復(fù)十分重要。隨著數(shù)據(jù)存儲(chǔ)需求的急劇膨脹，各種破壞性事件的頻繁發(fā)生，備份恢復(fù)技術(shù)逐漸發(fā)展起來。分布式文件備份具有十分重要的應(yīng)用意義以及良好的發(fā)展前景。

二、研究方案
三、研究計(jì)劃進(jìn)度表

四、經(jīng)費(fèi)預(yù)算

五、參考文獻(xiàn)

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