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计算机系统应用英文版:2013,22(8):184-189

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基于镜像的在线文件系统检查工具的研究与实现

王雅楠¹, 陈香兰¹, 代栋¹, 孙明明¹, 周学海^1,2

(1.中国科学技术大学计算机科学与技术学院, 合肥 230026;2.中国科学技术大学苏州研究院, 苏州 215123)

Research and Implementation of an Online File System Checker Based on Image

WANG Ya-Nan¹, CHEN Xiang-Lan¹, DAI Dong¹, SUN Ming-Ming¹, ZHOU Xue-Hai^1,2

(1.School of Computer Science and Technology, University of Technology and Science of China, Hefei 230026, China;2.Suzhou Institute for Advanced Study, University of Technology and Science of China, Hefei 230026, China)

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本文已被：浏览 1358次下载 2807次
Received:January 10, 2013 Revised:March 08, 2013

中文摘要: 设计和实现了一种全新的在线文件系统检查工具—OnlineFSCK(On-Line File System Checker). OnlineFSCK可以对在线的文件系统进行一致性检查. 利用OnlineFSCK对文件系统进行检查时, 文件系统可以继续正常提供服务. 提出和实现了一种对在线文件系统生成镜像的算法, 并将这个算法与现有的文件系统检查工具相结合, 最终达到对在线文件系统进行检查的目的. 针对ext3文件系统实现了OnlineFSCK的原型, 实验结果表明, OnlineFSCK在满足对性能的要求的前提下, 能够达到与传统文件系统检查工具相同的检查能力. OnlineFSCK的实现中没有修改文件系统的内核源码, 可以扩展支持多种文件系统.

中文关键词: 文件系统检查在线检查镜像文件系统一致性在线镜像

Abstract:This paper designs and implements OnlineFSCK (On-Line File System Checker), which checks the file system while it is online without modifying the in-kernel file system codes. The file system can continue providing service while it is being checked by OnlineFSCK. This paper proposes and implements an runtime imaging algorithm which, combined with the existing file system checkers, can provide us the ability to check the consistency of the existing running file systems. The prototype is implemented for ext3 file system. Experiments shows that our OnlineFSCK solution can guarantee the correctness as traditional file system checkers while keeping the performance of the production system neglectable impacted. As there is no need to modify the in-kernel codes to support it, Online FSCK can be easily extended to support other file systems.

keywords: file system checker online checker file system image file system consistency online filesystem imaging

文章编号： 中图分类号： 文献标志码：

基金项目:江苏省产学研前瞻性联合研究项目(BY2009128)

引用文本：
王雅楠,陈香兰,代栋,孙明明,周学海.基于镜像的在线文件系统检查工具的研究与实现.计算机系统应用,2013,22(8):184-189
WANG Ya-Nan,CHEN Xiang-Lan,DAI Dong,SUN Ming-Ming,ZHOU Xue-Hai.Research and Implementation of an Online File System Checker Based on Image.COMPUTER SYSTEMS APPLICATIONS,2013,22(8):184-189

Author Name	Affiliation
WANG Ya-Nan	School of Computer Science and Technology, University of Technology and Science of China, Hefei 230026, China
CHEN Xiang-Lan	School of Computer Science and Technology, University of Technology and Science of China, Hefei 230026, China
DAI Dong	School of Computer Science and Technology, University of Technology and Science of China, Hefei 230026, China
SUN Ming-Ming	School of Computer Science and Technology, University of Technology and Science of China, Hefei 230026, China
ZHOU Xue-Hai	School of Computer Science and Technology, University of Technology and Science of China, Hefei 230026, China Suzhou Institute for Advanced Study, University of Technology and Science of China, Hefei 230026, China