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Erschienen in:
2010 | OriginalPaper | Buchkapitel
ACAR: An Adaptive Cost Aware Cache Replacement Approach for Flash Memory
verfasst von : Yanfei Lv, Xuexuan Chen, Bin Cui
Erschienen in: Web-Age Information Management
Verlag: Springer Berlin Heidelberg
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Flash memory has been gaining more popularity as a substitution for magnetic disk. However, due to asymmetric IO latency, cache management policy needs to be reconsidered in systems equipped with flash. A novel buffer replacement approach named ACAR, which stands for Adaptive Cost Aware cache Replacement, is proposed in this paper to address this problem. Taking operation cost into consideration, ACAR allocates two pools for clean and dirty pages separately. In addition, dynamical pool size tuning is also performed according to IO pattern evolvement. Furthermore, hot data recognition capacity is realized in an enhanced version of ACAR. Experiments with artificial and real IO traces demonstrate ACAR outperforms the state-of-the-art cache replacement strategies.