A File-System-Aware FTL Design for Flash-Memory Storage Systems
Date Issued
2008
Date
2008
Author(s)
Wu, Po-Liang
Abstract
As flash memory became popular over various platforms, there is a strong demand on the performance degradation problem, due to the special characteristics of flash memory. This research proposes the design of a file-system-aware flash translation layer, in which a filter mechanism is designed to separate the access requests of file metadata and contents for better performance. A recovery scheme is also proposed to maintain the integrity of a file system. The proposed flash translation layer is implemented as a Linux device driver and evaluated with respect to ext2 and ext3 file systems. Experiments were also done over NTFS by a series of realistic traces. The experimental results show significant performance improvement over ext2, ext3, and NTFS file systems with limited system overheads.
Subjects
flash memory
performance
reliability
file systems
metadata
Type
thesis
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ntu-97-R95922031-1.pdf
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