文档介绍：华中科技大学
硕士学位论文
块级连续数据保护的虚拟恢复技术研究
姓名:张一萍
申请学位级别:硕士
专业:计算机系统结构
指导教师:李春花
2011-01-14
华中科技大学硕士学位论文
摘要*
随着对存储需求量的不断增长,用户对数据的连续可用性的需求标准也不断提
高。如何快速有效地保护和恢复数据,已成为目前信息存储领域的研究热点。连续
数据保护便是实现此要求的有效方法之一,它可以将业务数据恢复到过去的任意时
间点,实现业务数据的连续保护。目前,连续数据保护技术已逐渐应用于银行、证
劵等数据就是生命的行业。
针对传统的数据保护方案消耗时间长、效率较低、网络资源消耗量大的缺点,
本文提出了一种连续数据保护的虚拟恢复方法。该方法在服务器端的虚拟文件系统
和卷管理驱动层之间加入一层卷驱动程序,以实现自己的数据读写方法,来接管客
户端的数据请求命令,并利用数据映射机制,将多个文件数据集合呈现为一个单独
的逻辑卷,使得在用户提出恢复请求时能快速为用户重建一个与恢复时间点状态完
全一致的虚拟卷,实现业务的即时恢复要求。
通过将虚拟恢复与物理恢复进行比较,证明了在恢复数据量较大的情况下,虚
拟恢复机制能极大地提高系统恢复的效率。

关键词:虚拟化;快速恢复;映射机制;网络数据传输;连续数据保护

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华中科技大学硕士学位论文
Abstract∗
With the growing demand for storage of data, the needs of the standards of
continuous usability for usrs also , how to fast and effective protect
and restore data, has e the hotspot of information storage present. one of the core
function of Data backup is the realization of data of uninterrupted usability. And
continuous data protection(CDP) is the effective ways to realize the requirement and
prevent loss of data. continuous data protection(CDP) is a method that can independently
capture major data continuously or track data modification, and preserve change from the
past, so as to achieve any non preset point recovery method. Its characteristic is to the
protection of data is continuity and can recover quickly. At present, CDP technique has
been widely used in storage industry data protection.
As the traditional data protection scheme has ings that are time consuming,
low efficiency,and consume work resources, this paper puts forward a method of
virtual recovery for continuous data protection. This method add a layer of volume driver
between the server virtual file system driver layering and the volume management driver
layering, to realize their reading and writing data method ,taking over the client data
mands and use a data mapping mechanism to make multiple files data
collection appears as a singl