Adaptive Wear-Leveling in Flash-Based Memory
Adaptive Wear-Leveling in Flash-Based Memory
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DOI：
10.1109/lca.2014.2329871
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发表时间：
2015
影响因子：
2.3
通讯作者：
Jianwei Liao;Fengxiang Zhang;Li Li-Li;G. Xiao
中科院分区：
文献类型：
--
作者：
Jianwei Liao;Fengxiang Zhang;Li Li-Li;G. Xiao
本文提出了一种基于多个磨损阈值的自适应磨损均衡方案。该方案的基本思想是，块可以具有不同的磨损速度，并且磨损均衡机制直到某些热块的擦除计数达到阈值才进行数据迁移。通过一系列仿真实验的基础上，几个现实的磁盘痕迹，我们表明，建议的磨损均衡机制可以减少总的擦除次数，并产生均匀的擦除次数在所有块之间的存储设备的生命周期的后期。因此，不仅可以提高存储系统的性能，还可以在一定程度上延长基于闪存的存储器的寿命。
The paper presents an adaptive wear-leveling scheme based on several wear-thresholds in different periods. The basic idea behind this scheme is that blocks can have different wear-out speeds and the wear-leveling mechanism does not conduct data migration until the erasure counts of some hot blocks hit a threshold. Through a series of emulation experiments based on several realistic disk traces, we show that the proposed wear-leveling mechanism can reduce total erasure counts and yield uniform erasure counts among all blocks at the late lifetime of the storage devices. As a result, not only can the performance of storage systems be advanced, the lifespan of the flash-based memory can also be extended to a certain degree.