Fragmentation Degree Research Based on File's Layout

被引：1

作者：

Zhu, Yadong ^{[1
]}

Zhang, Jingwang ^{[1
]}

Wang, Chao ^{[1
]}

Liu, Zhenjun ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Comp Technol, Beijing 100864, Peoples R China

来源：

INFORMATION ENGINEERING FOR MECHANICS AND MATERIALS SCIENCE, PTS 1 AND 2 | 2011年 / 80-81卷

关键词：

fragmentation; read performance; defragmentation; fragmentation degree;

D O I：

10.4028/www.scientific.net/AMM.80-81.1217

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Numerous resource allocating and releasing will cause fragmentation which will seriously affect the I/O performance of file systems. One method to solve this problem is file defragmentation. This paper focuses on fragmentation detection, the key part of the file defragmentation. We estimate file fragmentation situation through file's layout, and then analyze the detailed effects of the situation on performance measurement. Then we quantize this by the file's "fragmentation degree" through theoretical and experimental analyses. Finally we use it to estimate the file's fragmentation and decide whether the file needs to be defragmented.

引用

页码：1217 / 1225

页数：9

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