| Dual-FTL:一种基于MLC/SLC双模闪存芯片的闪存转换层 |
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| 引用本文： | 刘洋,王峰.Dual-FTL:一种基于MLC/SLC双模闪存芯片的闪存转换层[J].河南师范大学学报(自然科学版),2014(5):148-154. |
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| 作者姓名： | 刘洋 王峰 |
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| 作者单位： | 河南财经政法大学现代教育技术中心; |
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| 基金项目： | 河南省软科学项目(142400410123;142400410106;132400410021);河南省科技攻关项目(122102210446;132102210487;142102210090) |
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| 摘 要： | 为了解决多级单元(MLC)闪存相对于单级单元(SLC)闪存写入性能低和擦除寿命短的问题,提出了一种基于MLC/SLC双模闪存存储芯片的闪存转换层Dual-FTL.利用MLC/SLC双模闪存芯片的双烧写模式,Dual-FTL将闪存空间分为容纳热数据的小容量SLC区域和容纳冷数据的大容量MLC区域.同时,Dual-FTL提出了识别数据冷热度的方法,并可以根据负载变化动态调整策略参数.实验结果表明,Dual-FTL可以让MLC/SLC双模闪存在一半的比特成本下提供和SLC闪存相似的性能和使用寿命.
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| 关 键 词： | 闪存转换层 多级单元闪存 单级单元闪存 热度 |
Dual-FTL MLC/SLC Dual Mode Flash Memory Chip Based Flash Translation Layer |
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| LIU Yang;WANG Feng.Dual-FTL MLC/SLC Dual Mode Flash Memory Chip Based Flash Translation Layer[J].Journal of Henan Normal University(Natural Science),2014(5):148-154. |
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| Authors: | LIU Yang;WANG Feng |
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| Institution: | LIU Yang;WANG Feng;Modern Education Technology Center,Henan University of Economics and Low; |
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| Abstract: | In order to solve the problems of slower write performance and shorter lifespan of MLC(Multi-level Cell)Flash compared to SLC(Single-level Cell)Flash memory,the presented paper proposes a MLC/SLC dual mode Flash memory based FTL(Flash Translation Layer),called Dual-FTL.Depending on the SLC mode of the MLC/SLC dual mode Flash memory,Dual-FTL splits the blocks into SLC area for hot data and MLC area for cold data,respectively.In addition,Dual-FTL presents the scheme of data hotness identification and the dynamic adaptation of workload changes.The experiment results showed that the Dual-FTL provides the performance and lifespan that similar to those of SLC flash memory. |
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| Keywords: | Flash Translation Layer Multi-level Cell Single-level Cell hotness |
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