대한임베디드공학회논문지 (IEMEK Journal of Embedded Systems and Applications)

대한임베디드공학회 (Institute of Embedded Engineering of Korea)
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메모리에서 정적 마모도 평준화를 위한 콜드 블록 추적 기법

Tracking Cold Blocks for Static Wear Leveling in FTL-based NAND Flash Memory

  • 투고 : 2017.05.15
  • 심사 : 2017.05.29
  • 발행 : 2017.06.30
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초록

Due to the characteristics of low power, high durability and high density, NAND flash memory is being heavily used in various type of devices such as USB, SD card, smart phone and SSD. On the other hand, because of another characteristic of flash cell with the limited number of program/erase cycles, NAND flash memory has a short lifetime compared to other storage devices. To overcome the lifetime problem, many researches related to the wear leveling have been conducted. This paper presents a method called a TCB (Tracking Cold Blocks) using more reinforced constraint conditions when classifying cold blocks than previous works. TCB presented in this paper keeps a MCT (Migrated Cold block Table) to manage the enhanced classification process of cold blocks, with which unnecessary migrations of pages can be reduced much more. Through the experiments, we show that TCB reduces the overhead of wear leveling by about 30% and increases the lifetime up to about 60% compared to BET and BST.

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참고문헌

  1. L. Wilson, "International Technology Roadmap for Semiconductors (ITRS)," Semiconductor Industry Association, 2013.
  2. K. Suh, B. Suh, Y. Lim, J. Kim, Y. Choi, Y. Koh, S. Lee, S. Kwon, B. Choi, J. Yum, J. Choi, J. Kim, H. Lim, "3.3 V 32 Mb NAND Flash Memory With Incremental Step Pulse Programming Scheme," IEEE Journal of Solid-State Circuits, Vol. 30, No. 11, pp. 1149-1156, 1995. https://doi.org/10.1109/4.475701
  3. D. BWoodhouse, "JFFS: The Journalling Flash File System," Ottawa linux symposium, Vol. 2001, 2001.
  4. B. Chang, Z. Wang, B. Chen, F. Zhang, "Mobipluto: File System Friendly Deniable Storage for Mobile Devices," Proceedings of the ACM 31st Annual Computer Security Applications Conference, pp. 381-390, 2015.
  5. D. Agrawal, D. Ganesan, R. Sitaraman, Y. Diao, S. Singh, "Lazy-adaptive Tree: An Optimized Index Structure for Flash Devices," Proceedings of the VLDB Endowment, Vol. 2, No. 1, pp. 361-372, 2009. https://doi.org/10.14778/1687627.1687669
  6. M. Athanassoulis, A. Ailamaki, "BF-tree: Approximate Tree Indexing," Proceedings of the VLDB Endowment, Vol. 7, No. 14, pp. 1881-1892, 2014. https://doi.org/10.14778/2733085.2733094
  7. L. P. Chang, "On Efficient Wear Leveling for Large-scale Flash-memory Storage Systems," Proceedings of the ACM symposium on Applied computing, pp. 1126-1130, 2007.
  8. Y. Chang, J. Hsieh, T. Kuo, "Improving Flash Wear-leveling by Proactively Moving Static Data," IEEE Transactions on Computers, Vol. 59, No. 1, pp. 53-65, 2010. https://doi.org/10.1109/TC.2009.134
  9. S.H. Kim, J.H. Choi, J.W. Kwak, "BST: Hidden Cold Block-Aware Wear Leveling Using Bit-Set Threshold for NAND Flash Memory," IEICE Transactions on Information and Systems, Vol. 99, No. 4, pp. 1242-1245, 2016.
  10. L. Chang, L. Huang, "A Low-cost Wear-leveling Algorithm for Block-mapping Solid-state Disks," Proceedings of the 2011 SIGPLAN/SIGBED conference on Languages, compilers and tools for embedded systems, Vol. 46, No. 5, pp. 31-40, 2011.
  11. M. Murugan, D. H. Du, "Rejuvenator: A Static Wear Leveling Algorithm for NAND Flash Memory With Minimized Overhead," Proceedings of the IEEE 27th Symposium on Mass Storage Systems and Technologies, pp. 1-12, 2011.
  12. C. Wang, W. Wong, "Observational Wear Leveling: an Efficient Algorithm for Flash Memory Management," Proceedings of IEEE Design Automation Conference, pp. 235-242, 2012.
  13. O. Kwon, K. Koh, J. Lee, H. Bahn, "FeGC: An Efficient Garbage Collection Scheme for Flash Memory Based Storage Systems," Journal of Systems and Software, Vol. 84, No. 9, pp. 1507-1523, 2011. https://doi.org/10.1016/j.jss.2011.02.042
  14. M. Yang, Y. Chang, C. Tsao, P. Huang, "New ERA: New Efficient Reliability-aware Wear Leveling for Endurance Enhancement of Flash Storage Devices," Proceedings of the ACM 50th Annual Design Automation Conference, pp. 163, 2013.
  15. M. Wu, W. Zwaenepoel, "eNVy: a Non-volatile, Main Memory Storage System," Proceedings of the ACM sixth international conference on Architectural support for programming languages and operating systems, Vol. 28, No. 5, pp. 86-97, 1994.
  16. J.S. Bucy, J. Schindler, S. W. Schlosser, G. R. Ganger, "The Disksim Simulation Environment Version 4.0 Reference Manual (cmu-pdl-08-101)," Parallel Data Laboratory, 2008.
  17. V. Prabhakaran, T. Wobber, "SSD Extension for DiskSim Simulation Environment," Microsoft Reseach, 2009.
  18. Trace, Exchange, "SNIA IOTTA Repository," 2010.