A version-based strategy for reliability enhancement of flash file systems

Authors:
Pei-Han Hsu;Yuan-Hao Chang;Po-Chun Huang;Tei-Wei Kuo;David Hung-Chang Du
Affiliations:
National Taiwan University, Taipei, Taiwan (R.O.C.);National Taipei University of Technology, Taipei, Taiwan (R.O.C.);National Taiwan University, Taipei, Taiwan (R.O.C.);National Taiwan University, Taipei, Taiwan (R.O.C.);University of Minnesota, Minneapolis, MN
Venue:
Proceedings of the 48th Design Automation Conference
Year:
2011

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Abstract

In recent years, reliability has become one critical issue in the designs of flash file systems due to the growing unreliability of advanced flash-memory chips. In this paper, a version-based strategy with optimal space utilization is proposed to maintain the consistency among page versions of a file for potential recovery needs with the considerations of the write constraints of multi-level-cell flash memory. A series of experiments was conducted to show that the proposed strategy could improve the reliability of flash file systems with limited management and space overheads.