ZFTL:A Zone-based Flash Translation Layer with a Two-Tier Selective Caching Mechanism
Abstract—In this paper,we propose a Zone-based Flash Translation Layer (ZFTL) for NAND flash-based storage systems.ZFTL is a novel page-level flash translation layer to divide a whole flash into several Zones so that it can reduce the size of SRAM by caching address mapping information of on-demand Zone.Moreover,we propose a two-tier selective caching mechanism to jointly exploit temporal locality and spatial locality of workloads.By selectively caching request mapping entry with the two-tier architecture,ZFTL utilizes the limited SRAM more efficiently so as to improve cache hit ratio and reduce system respond time.Our experimental evaluation with various realistic workloads shows that ZFTL outperforms state-of-the-art FTL schemes.In particular,ZFTL reduces address translation overhead by up to 85%and improves system response time by up to 60%compared to DFTL,though it uses only 5% of SRAM.
flash memory flash translation layer zone-based
Mingbang Wang Youguang Zhang Wang Kang
Department of Electronic and Information Engineering Beihang University Beijing, China
国际会议
2012 IEEE 14th International Conference on Communication Technology(2012年第十四届通信技术国际会议(ICCT 2012))
成都
英文
1573-1583
2012-11-09（万方平台首次上网日期，不代表论文的发表时间）