YoungHwan Kim
ABSTRACT
Recently, flash memory in serving as a cache layer for disks gains a lot of attention. However, the out-place update characteristic of flash memory leads to increase of garbage collection overhead and decrease of cache hit ratio. In this paper, we propose FMCM which is the management scheme for a circular cache according to consideration of characteristics of the flash memory, search into new data, block replacement and garbage collection mechanism. We evaluated FMCM using a trace-driven simulator. The proposed scheme can save the disk energy about 3~5% compared with a typical system using flash memory cache. FMCM also improve the average response time about 1.5~4ms faster than the existing system.
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- T. Kgil, D. Roberts, and T. Mudge, Improving NAND Flash Based Disk Caches. In Proceedings of the International Symposium on Computer Architecture, pp. 327--338, 2008 Google ScholarDigital Library
- M. Wu and W. Zwaenepoel. eNVy: A Non-Volatile, Main Memory Storage system. In Proc. Int'l Conf. on Arch. Support for Prog. Lang. and Oper. sys., Oct 1994. Google ScholarDigital Library
Index Terms
- FMCM: a efficient flash memory cache management scheme for energy-efficient disks
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