Performance Trade-Off of File System between Overwriting and Dynamic Relocation on a Solid State Drive
- Authors
- Hyun, Choulseung; Kwon, Hunki; Kim, Jaeho; Byun, Eujoon; Choi, Jongmoo; Lee, Donghee; Noh, Sam H.
- Issue Date
- 2008
- Publisher
- WORLD ACAD SCI, ENG & TECH-WASET
- Keywords
- Evergreen File System; Overwrite; Relocation; Solid State Drive
- Citation
- PROCEEDINGS OF WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY, VOL 29, v.29, pp.358 - +
- Journal Title
- PROCEEDINGS OF WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY, VOL 29
- Volume
- 29
- Start Page
- 358
- End Page
- +
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/29859
- Abstract
- Most file systems overwrite modified file data and metadata in their original locations, while the Log-structured File System (LFS) dynamically relocates them to other locations. We design and implement the Evergreen file system that can select between overwriting or relocation for each block of a file or metadata. Therefore, the Evergreen file system can achieve superior write performance by sequentializing write requests (similar to LFS-style relocation) when space utilization is low and overwriting when utilization is high. Another challenging issue is identifying performance benefits of LFS-style relocation over overwriting on a newly introduced SSD (Solid State Drive) which has only Flash-memory chips and control circuits without mechanical parts. Our experimental results measured on a SSD show that relocation outperforms overwriting when space utilization is below 80% and vice versa.
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Collections - College of Engineering > Computer Engineering Major > 1. Journal Articles
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