TreeFTL:Efficient RAM Management for High Performance of NAND Flash-based Storage Systems-论文注释笔记-优快云博客

本文提出了一种名为TreeFTL的高效RAM管理方案，旨在通过组织地址转换页和数据页在RAM中的树形结构，动态适应工作负载，调整地址映射和数据缓冲分区。此外，TreeFTL还采用了轻量级的LRU算法实现RAM缓存淘汰机制。实验结果显示，与闪存存储系统中最新的两种RAM管理方案相比，在64MB RAM缓存的情况下，TreeFTL平均分别能将服务时间减少46.6%和49.0%。

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IEEEXPLORE论文：

TreeFTL:Efficient RAM Management for High Performance of NAND Flash-based Storage Systems

摘要：

Abstract—NAND ﬂash memory is widely used for secondary
storage today. The ﬂash translation layer (FTL) is the embedded
software that is responsible for managing and operating in ﬂash
storage system. One important module of the FTL performs
RAM management. It is well-known to have a signiﬁcant impact
on ﬂash storage system’s performance. This paper proposes an
efﬁcient RAM management scheme called TreeFTL. As the name
suggests, TreeFTL organizes address translation pages and data
pages in RAM in a tree structure, through which it dynamically
adapts to workloads by adjusting the partitions for address
mapping and data buffering. TreeFTL also employs a lightweight
mechanism to implement the least recently used (LRU) algorithm
for RAM cache evictions. Experiments show that compared to
the two latest schemes for RAM management in ﬂash storage
system, TreeFTL can reduce service time by 46.6% and 49.0%
on average, respectively, with a 64MB RAM cache.