發(fā)布時(shí)間：2018-01-07 07:09

  本文關(guān)鍵詞：區(qū)域云跨地域節(jié)點(diǎn)間動(dòng)態(tài)副本策略的研究　出處：《華南理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 云計(jì)算 區(qū)域云 副本策略 時(shí)間局部性

【摘要】：云計(jì)算的興起和迅速發(fā)展正在深刻的改變著人們使用互聯(lián)網(wǎng)的方式。云的構(gòu)成有各種方式，當(dāng)云計(jì)算的規(guī)模不斷擴(kuò)大，成為跨地域的區(qū)域云的情況下，如何保證云數(shù)據(jù)高可靠、低延遲的訪問成為云計(jì)算系統(tǒng)中一個(gè)重要的研究課題。 采用分布式結(jié)構(gòu)和副本技術(shù)是解決這一問題的思路之一。在大型分布式系統(tǒng)中，副本是提高系統(tǒng)冗余度，保障數(shù)據(jù)高可用性和提高數(shù)據(jù)訪問效率的通用技術(shù)。而現(xiàn)有的云存儲(chǔ)分布式文件系統(tǒng)中所采用的靜態(tài)副本策略，對(duì)所有文件一視同仁，不能很好的適應(yīng)多變的用戶需求，如果直接用于跨地域的區(qū)域云，頻繁的跨地域遠(yuǎn)程訪問數(shù)據(jù)不但對(duì)地域間骨干網(wǎng)絡(luò)造成壓力，也嚴(yán)重影響了云服務(wù)的響應(yīng)速度。 本文針對(duì)區(qū)域云系統(tǒng)中跨地域分布的用戶網(wǎng)，提出了區(qū)域云節(jié)點(diǎn)的概念及系統(tǒng)模型，并在此基礎(chǔ)上提出了一種區(qū)域云跨地域節(jié)點(diǎn)間動(dòng)態(tài)副本策略。該策略通過監(jiān)控用戶對(duì)數(shù)據(jù)的需求及相關(guān)參數(shù)對(duì)數(shù)據(jù)資源進(jìn)行動(dòng)態(tài)規(guī)劃和調(diào)整，基于時(shí)間局限性定義文件遠(yuǎn)程請(qǐng)求熱度、文件平均請(qǐng)求跨度的概念，，使得跨地域節(jié)點(diǎn)請(qǐng)求較多的熱點(diǎn)數(shù)據(jù)能夠動(dòng)態(tài)的、快速的在區(qū)域云內(nèi)擴(kuò)散，讓用戶可以就近訪問云服務(wù)的數(shù)據(jù)資源，從而減少對(duì)區(qū)域云跨地域節(jié)點(diǎn)間骨干網(wǎng)絡(luò)的帶寬消耗，提高數(shù)據(jù)訪問的效率。 本文對(duì)所提出的副本策略進(jìn)行了仿真實(shí)驗(yàn)，仿真結(jié)果顯示，該策略能夠快速的增加文件副本數(shù)量，減少文件的跨地域節(jié)點(diǎn)的訪問，提高系統(tǒng)的比特有效率，從而減少對(duì)區(qū)域云間網(wǎng)絡(luò)帶寬的消耗，并有效縮減平均文件訪問時(shí)間。
[Abstract]:The rise and rapid development of cloud computing is profoundly changing the way people use the Internet. Cloud composition has various ways, when the scale of cloud computing continues to expand to cross-regional cloud. How to ensure high reliability and low delay access of cloud data has become an important research topic in cloud computing systems. Using distributed structure and replica technology is one of the ways to solve this problem. In large distributed system, replica is to improve the redundancy of the system. General technology to ensure high availability of data and improve the efficiency of data access. In the existing cloud storage distributed file system, static copy strategy is used, all files are treated equally. Can not adapt to the changing needs of users, if directly used in cross-regional regional cloud, frequent cross-regional remote access data not only to the backbone of the region network pressure. It also severely affects the response speed of cloud services. In this paper, the concept and system model of regional cloud nodes are proposed for the users of regional cloud systems with cross-geographical distribution. On this basis, a dynamic replica strategy between regional cloud nodes is proposed, which can dynamically program and adjust the data resources by monitoring the users' demand for data and related parameters. The concept of remote request heat and average request span of files based on the limitation of time makes the hot data which is requested by multi-region nodes can spread dynamically and quickly in the regional cloud. Users can access the data resources of the cloud service in the near way, thus reducing the bandwidth consumption of the backbone network between regional cloud nodes, and improving the efficiency of data access. The simulation results show that the strategy can increase the number of file replicas quickly, reduce the access of cross-regional nodes, and improve the system bit efficiency. Thus reducing the bandwidth consumption and reducing the average file access time.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TP3

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 高巍;侯樂青;;對(duì)我國(guó)互聯(lián)網(wǎng)互聯(lián)互通問題的探討[J];電信網(wǎng)技術(shù);2009年04期

2 祝家鈺;肖丹;;云計(jì)算架構(gòu)下的動(dòng)態(tài)副本管理策略[J];計(jì)算機(jī)工程與設(shè)計(jì);2012年09期

相關(guān)碩士學(xué)位論文 前1條

1 戴曉露;基于P2P的廣域存儲(chǔ)系統(tǒng)中副本管理相關(guān)問題的研究[D];浙江大學(xué);2007年

本文編號(hào)：1391494