| 重复数据删除系统元数据存储布局研究 |
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| 引用本文： | 阎芳,谭毓安,孙志卓,刘靖宇.重复数据删除系统元数据存储布局研究[J].北京理工大学学报,2014,34(5):517-522. |
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| 作者姓名： | 阎芳 谭毓安 孙志卓 刘靖宇 |
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| 作者单位： | 北京理工大学计算机学院,北京 100086;北京物资学院信息学院,北京 101149;北京理工大学计算机学院,北京 100086 |
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| 基金项目： | 国家自然科学基金资助项目（61003262）；北京市“青年英才计划”资助项目（YETP1532） |
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| 摘 要： | 根据重复数据删除的特点，针对连续数据访问为主的应用，设计基于B+树的元数据索引结构；将元数据分为冷热两种，分别设计不同的元数据布局策略。研究结果表明，低能耗磁盘能够保持更长时间的待机状态以便节能，同时可以有效地减少重复数据删除时的随机磁盘访问次数。并且没有额外的硬件开销，实现仅在磁盘上存储索引，而不是之前研究中的在磁盘和内存中存储索引。
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| 关 键 词： | 重复数据删除 元数据 存储布局 索引结构 |
| 收稿时间： | 2012/8/16 0:00:00 |
Metadata Layout for De-Duplication System |
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| YAN Fang,TAN Yu-an,SUN Zhi-zhuo and LIU Jing-yu.Metadata Layout for De-Duplication System[J].Journal of Beijing Institute of Technology(Natural Science Edition),2014,34(5):517-522. |
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| Authors: | YAN Fang TAN Yu-an SUN Zhi-zhuo and LIU Jing-yu |
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| Institution: | 1.School of Computer Science, Beijing Institute of Technology, Beijing 100081, China;School of Information, Beijing Wuzi University, Beijing 101149, China2.School of Computer Science, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | According to the characteristics of data de-duplication, the metadata indexing structure based on B+ tree was introduced mainly for continuous data access applications, in which the metadata was divided into two kinds by popular and cold, with different layout strategies. As a consequence, the low power disks can stay in the standby state for a longer period of time with better energy efficiency, while effectively reducing random disk accesses with no additional hardware overhead. The method proposed in this paper makes it possible to store the index of the medium on disk only, rather than on disk and memory in previous studies. |
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| Keywords: | data de-duplication metadata storage layout index structure |
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