【作者】 张艳；

【导师】 何德全；

【作者基本信息】 四川大学 ， 应用数学， 2006， 博士

【摘要】 随着计算机应用的不断深入，越来越多的企业使用信息系统处理日常业务，存储在信息系统中的数据成为企业的重要资源，数据的丢失以及信息系统的失效都将给企业造成重大的损失。然而，由于各种原因，人们无法预测和避免信息系统故障和灾难的发生，难以防止企业业务处理的中断。如何使突发灾难造成的损失降到最低限度，更好地保护重要数据，保证信息系统的安全、可靠、连续运行，已成为信息安全领域一个备受瞩目的研究方向。尤其是在9.11事件之后，保障信息系统的连续可用性已成为国内外关注的焦点，信息系统的灾难备份与恢复建设日益受到各级政府部门以及企业的高度重视。在安全防护体系中，信息系统的灾难备份和恢复技术已成为保障系统安全的重要措施。 论文从确保信息系统的连续可用性角度出发，以信息系统中数据、系统和业务应用的备份与恢复为主要研究对象，提出将灾难恢复分为数据级、系统级和应用级三个层次。根据这种层次划分，合理地定义了9个灾难恢复等级，对各灾难恢复等级详细地给出了定性的说明，并采用四个指标进行了定量描述。论文提出了信息系统的灾难恢复体系结构，并用三维模型描述了灾难恢复指标、备份与恢复技术、灾难恢复计划与措施三者之间的关系，从而为信息系统的灾难恢复提供了一个完整的框架和解决方案。 论文对灾难恢复体系结构所涉及到的灾难备份与恢复技术进行了综合分析，研究了数据、系统和应用三个层次的备份和恢复技术，比较各种技术的优缺点，对基于逻辑卷复制的灾难恢复技术进行了详细研究。 远程备份是一种高性能的数据备份和灾难恢复技术，论文分析了现有远程备份技术有关模型，对基于数据库日志复制的远程备份技术进行了详细的分析，更多还原

【Abstract】 With the widespread use of the computer technology, more and more companies deal with business with information systems. The data saved in the information systems have become important resources of the companies. The lost of the data and the failure of the information system will cause uncountable losses to the companies. People could not forecast and prevent the failure or disaster of the information systems because of various reasons. The demand of the continous application of the information systems has become study focus, and disaster backup and recovery have become the research hotspots and emphasis in the field of Information Security. Disaster recovery technology can protect valuable information in the computer systems and efficiently ensure the normal work of computer systems when the disaster occurs.The dissertation has analyzed the disaster recovery degrees model of SHARE78, and divided the disaster recovery systems into data, system and application tiers. According to the three tiers division, the new disaster recovery degrees are given, i.e, the nine disaster recovery degrees are defined. The dissertation has described the detailed stipulates of every degree. The dissertation presents the technological frameworks of disaster backup and recovery systems, and describes the disaster recovery models with three matrixs, which contains the guideline, technologies and measures.The dissertation has analyzed the techniques related to frameworks of disaster backup and recovery systems, and a comprehensive comparison of various techniques is given, the research of disaster recovry based on the logic volume更多还原