标题:RMW-F: A Design of RMW-Free Cache Using Built-in NAND-Flash for SMR Storage
作者:Ma, Chenlin; Shen, Zhaoyan; Han, Lei; Shao, Zili
通讯作者:Shao, ZL;Shao, Zili
作者机构:[Ma, Chenlin] Shenzhen Univ, RM1304,13-F,Technol Bldg,Nanhai Ave 3688, Shenzhen, Peoples R China.; [Shen, Zhaoyan] Shandong Univ, RM 414,4-F,N3 Bldg 更多
会议名称:Embedded Systems Week / Int Conf on Compilers, Architecture, and Synthesis for Embedded Systems (CASES) / International Conference on Hardware/Software Codesign and System Synthesis (CODES+ISSS) / Int Conf on Embedded Software (EMSOFT)
会议日期:OCT 13-18, 2019
来源:ACM TRANSACTIONS ON EMBEDDED COMPUTING SYSTEMS
出版年:2019
卷:18
期:5
DOI:10.1145/3358210
关键词:Shingled magnetic recording; flash memory; cache management
摘要:Shingled Magnetic Recording (SMR) disks have been proposed as a high-density, non-volatile media and precede traditional hard disk drives in both storing capacity and cost. However, the intrinsic characteristics of SMR disks raise a major performance challenge named read-modify-write operations (RMWs) that are time-consuming and can significantly degrade the overall system performance. Current designs of SMR disks usually adopt a persistent cache to alleviate the negative effect brought by RMWs and the cache is used as a first-level cache to buffer all the incoming writes of the whole SMR storage system. In this paper, we propose to change the functionality of the cache, that is, the cache will no longer serve as a first-level cache like previous. Incoming data are distinguished according to their different write-back behavior and those data which will incur RMWs will be left in our built-in NAND flash cache called RMW-free Cache (RMW-F) to eliminate the need of RMWs. Besides, RMW-F improves the cleaning efficiency by a model that takes both write-back cost and data popularity into considerations. Our experimental results show that RMW-F can achieve both system performance and cleaning efficiency improvements.
收录类别:CPCI-S;EI;SCOPUS;SCIE
资源类型:会议论文;期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85073151606&doi=10.1145%2f3358210&partnerID=40&md5=edcfcfcd1ea508f6618e3d13364ce351
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