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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/37611
標題: | 檔案系統導向設計之快閃記憶體儲存系統 A File-System-Aware FTL Design for Flash-Memory Storage Systems |
作者: | Po-Liang Wu 吳柏良 |
指導教授: | 郭大維(Tei-Wei Kuo) |
關鍵字: | 快閃記憶體,效能,可靠性,檔案系統,元資料, flash memory,performance,reliability,file systems,metadata, |
出版年 : | 2008 |
學位: | 碩士 |
摘要: | 隨著快閃記憶體被廣泛的應用在眾多平台上,因快閃記憶體的特性而造成系統效能下降的問題也變得更為重要。本篇研究提出了一個檔案系統感知的快閃記憶體轉換層次設計,其中篩選機制將會區分出存取元資料(metadata)的請求並藉以提升系統效能;同時也提出了修復機制以維持檔案系統的健全性。所提出的快閃記憶體管理機制實作在Linux裝置驅動程式中,並且評估在ext2和ext3兩種檔案系統上的效能,在針對NTFS檔案系統以一系列真實的傳輸記錄做實驗,實驗結果在ext2、ext3和NTFS檔案系統上展現顯著的效能提升,並僅造成有限的額外負擔。 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. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/37611 |
全文授權: | 有償授權 |
顯示於系所單位: | 資訊工程學系 |
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ntu-97-1.pdf 目前未授權公開取用 | 514.35 kB | Adobe PDF |
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