基于区域页级映射的闪存转换层设计

发布时间：2018-04-12 10:46

本文选题：固态硬盘 + 多通道结构　；参考：《微电子学与计算机》2016年04期

【摘要】：针对固态硬盘中闪存不能进行本地更新操作以及擦写次数有限的特性,基于多通道并行结构的固态盘,提出一种基于区域的页级地址映射方案,将连续逻辑页分配到不同的通道中并利用三级地址映射方法.利用动态和静态损耗均衡算法,提出了分层的损耗均衡算法和垃圾回收方案.分析表明该算法能释放固态盘内存空间,延长固态盘的寿命,提高整体性能,映射表内存占用相对传统页级映射减少近70%.
[Abstract]:In view of the fact that flash memory in solid state hard disk can not perform local update operation and the number of rewriting is limited, a page-level address mapping scheme based on region is proposed based on multi-channel parallel structure of solid-state disk.Successive logical pages are assigned to different channels and three-level address mapping methods are used.Based on the dynamic and static loss equalization algorithm, a hierarchical loss equalization algorithm and a garbage collection scheme are proposed.The analysis shows that the algorithm can release the memory space of the solid-state disk, prolong the lifetime of the solid-state disk, improve the overall performance, and reduce the memory footprint of the mapping table by nearly 70% compared with the traditional page-level mapping.
【作者单位】：中航工业西安航空计算技术研究所;机载弹载计算机航空科技重点实验室;
【基金】：航空基金资助项目(2013ZC31005)
【分类号】：TP333

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