DSTL: A Demand-Based Shingled Translation Layer for Enabling Adaptive Address Mapping on SMR Drives

doi:10.1145/3391892

淡江大學機構典藏 > 工學院 > 電機工程學系暨研究所 > 期刊論文 > Item 987654321/120139

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題名:	DSTL: A Demand-Based Shingled Translation Layer for Enabling Adaptive Address Mapping on SMR Drives
作者:	Yi-Jing Chuang;Shuo-Han Chen;Yuan-Hao Chang;Yu-Pei Liang;Hsin-Wen Wei;Wei-Kuan Shih
日期:	2020-07-15
上傳時間:	2021-03-11 12:10:40 (UTC+8)
摘要:	Shingled magnetic recording (SMR) is regarded as a promising technology for resolving the areal density limitation of conventional magnetic recording hard disk drives. Among different types of SMR drives, drive-managed SMR (DM-SMR) requires no changes on the host software and is widely used in today’s consumer market. DM-SMR employs a shingled translation layer (STL) to hide its inherent sequential-write constraint from the host software and emulate the SMR drive as a block device via maintaining logical to physical block address mapping entries. However, because most existing STL designs do not simultaneously consider the access pattern and the data update frequency of incoming workloads, those mapping entries maintained within the STL cannot be effectively managed, thus inducing unnecessary performance overhead. To resolve the inefficiency of existing STL designs, this article proposes a demand-based STL (DSTL) to simultaneously consider the access pattern and update frequency of incoming data streams to enhance the access performance of DM-SMR. The proposed design was evaluated by a series of experiments, and the results show that the proposed DSTL can outperform other SMR management approach by up to 86.69% in terms of read/write performance.
關聯:	ACM Transactions on Embedded Computing Systems 19(4), 25
DOI:	10.1145/3391892
顯示於類別:	[電機工程學系暨研究所] 期刊論文

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