计算机应用 ›› 2012, Vol. 32 ›› Issue (08): 2141-2149.DOI: 10.3724/SP.J.1087.2012.02141

• 先进计算 • 上一篇    下一篇

块级连续数据保护系统元数据管理方法

李红艳1,2   

  1. 1. 湖北经济学院 信息管理学院,武汉 430205
    2. 华中科技大学 武汉光电国家实验室,武汉 430074
  • 收稿日期:2012-02-20 修回日期:2012-04-08 发布日期:2012-08-28 出版日期:2012-08-01
  • 通讯作者: 李红艳
  • 作者简介:李红艳(1978-),女,湖北襄阳人,副教授,博士研究生,主要研究方向:网络存储系统。
  • 基金资助:
    国家973计划项目(2011CB302303);国家自然科学基金资助项目(60933002);湖北省教育厅科研计划项目(Q20121906,2011jytq044)

Methods of metadata management in block-level continuous data protection system

LI Hong-yan1,2   

  1. 1. School of Information Management, Hubei University of Economics, Wuhan Hubei 430205, China
    2. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan Hubei 430074, China
  • Received:2012-02-20 Revised:2012-04-08 Online:2012-08-28 Published:2012-08-01
  • Contact: LI Hong-yan

摘要: 为有效组织连续数据保护(CDP)的历史数据以提高灾难发生时系统的恢复效率,研究了影响CDP系统恢复性能的元数据管理方法,设计并实现了三种元数据管理方法。其中两种(DIR-MySQL和OPT-MySQL)是简单的基于MySQL数据库的实现,而另一种(META-CDP)是根据应用特点而设计的。实验结果表明,三种管理方法均能够有效提高系统的恢复效率。其中,前两种方式随着恢复数据量的增加,所需要的恢复时间剧增;而后一种方式随着数据量的增加,恢复时间增加很小,其效率比前两种方法高很多,而且其性能也在可接受范围内。

关键词: 连续数据保护, 数据备份, 恢复时间, 元数据管理

Abstract: To effectively organize the historical data of Continuous Data Protection (CDP) systems and improve the recovery efficiency in case of the disaster occurrences, this paper presented three different methods for metadata management in CDP systems, which has important impacts on the system recovery performance. The former two (DIR-MySQL and OPT-MySQL) were simple implementations based on MySQL database and the other one (META-CDP) was designed taking its characteristics into consideration. The experimental results show that the three methods all can increase the recovery efficiency of CDP systems. MySQL based methods will get worst as the amount of recovery data increases, and the META-CDP method is not much sensitive to the increasing amount of recovery data. The META-CDP method is far more efficient than the other two and its performance is reasonably acceptable.

Key words: Continuous Data Protection (CDP), data backup, recovery time, metadata management

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