Migration-based hybrid cache design for file systems over flash storage devices

Authors:
Po-Chun Huang;Yuan-Hao Chang;Che-Wei Tsao;Ming-Chang Yang;Cheng-Kang Hsieh
Affiliations:
Academia Sinica, Taipei, Taiwan (R.O.C.);Academia Sinica, Taipei, Taiwan (R.O.C.);National Taiwan University, Taipei, Taiwan (R.O.C.);National Taiwan University, Taipei, Taiwan (R.O.C.);University of California, Los Angeles, CA
Venue:
ACM SIGAPP Applied Computing Review
Year:
2013

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Abstract

This work is motivated by the urgent need to enhance the reliability of file systems in battery-powered mobile computing systems and consumer electronics that utilize flash storage devices for data storage. In this paper, we use non-volatile RAM (NVRAM) in the cache design because of its non-volatility and random byte addressability properties. Specifically, we propose a migration-based caching strategy that exploits NVRAM to enhance the reliability of file systems and to improve the access performance by utilizing the localities of accesses and the characteristics of flash storage devices. Our experimental results demonstrate that the proposed strategy can significantly improve the performance and reliability of file systems in flash storage devices.