Reducing write amplification of flash storage through Cooperative Data Management with NVM
- 주제(키워드) Flash Memory , Non-volatile Memory , Write Amplification
- 관리정보기술 faculty
- 등재 SCOPUS
- 발행기관 IEEE Computer Society
- 발행년도 2017
- URI http://www.dcollection.net/handler/ewha/000000156004
- ISBN 9781467390552
- 본문언어 영어
- Published As http://dx.doi.org/10.1109/MSST.2016.7897087
초록/요약
Write amplification is a critical factor that limits the stable performance of flash-based storage systems. To reduce write amplification, this paper presents a new technique that cooperatively manages data in flash storage and nonvolatile memory (NVM). Our scheme basically considers NVM as the cache of flash storage, but allows the original data in flash storage to be invalidated if there is a cached copy in NVM, which can temporarily serve as the original data. This scheme eliminates the copy-out operation for a substantial number of cached data, thereby enhancing garbage collection efficiency. Experimental results show that the proposed scheme reduces the copy-out overhead of garbage collection by 51.4% and decreases the standard deviation of response time by 35.4% on average. © 2016 IEEE.
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