高技术通讯2017，Vol.27Issue(2)：140-149,10.DOI:10.3772/j.issn.1002-0470.2017.02.005
高性能混合结构的瓦记录磁盘系统的设计与实现
Design and implementation of a high performance hybridshingled write disk system
摘要
Abstract
The shingled magnetic recording (SMR), a new magnetic recording technique, was analyzed, and the following were pointed out: the main drawback of the SMR is that random-write access to the disk is restricted due to the overlaps in the layout of data tracks;The seagate shingled write disk (SSWD) mitigates the random-write access restrictions by using an internal persistent cache, but it encounters the poor performance with sustained random writes.In consideration of the situation, a hybrid shingled write disk (HSWD) system was designed by combining it with the solid state drive (SSD).Then, two different policies for caching between the persistent cache and the native region, called the fully-associative and the set-associative), as well as the three different collection policies of LRU, FIFO and MOST, were implemented, and they were compared respectively by some experiments and theoretical analysis.The performance of the HSWD was tested and compared with the SSWD and Flashcache.The evaluation results demonstrated that the performance in persistent random writing of the HSWD was great higher then the SSWD and Flashcache, for example, 2.25x faster than the SSWD, and 1.32x faster than Flashcache in replaying hm0 trace.关键词
瓦记录(SMR)/瓦记录磁盘(SSWD)/固态硬盘(SSD)/混合系统/缓存策略/回收策略Key words
shingled magnetic recording (SMR)/seagate shingled write disk (SSWD)/solid state drive (SSD)/hybrid system/caching policy/collection policy引用本文复制引用
马留英,肖文健,董欢庆,许鲁..高性能混合结构的瓦记录磁盘系统的设计与实现[J].高技术通讯,2017,27(2):140-149,10.基金项目
863计划(2013AA013205),中国科学院先导专项基金(XDA06010401)和中国科学院重点部署基金(KGZD-EW-103-5(7))资助项目. （2013AA013205）
