高性能混合结构的瓦记录磁盘系统的设计与实现

发布时间：2018-04-28 22:00

本文选题：瓦记录(SMR) + 瓦记录磁盘(SSWD)　；参考：《高技术通讯》2017年02期

【摘要】：对新的磁记录技术——瓦记录(SMR)进行了性能分析,针对SMR叠瓦式的磁道布局方式严重限制了其随机写性能,希捷公司的瓦记录磁盘(SSWD)在磁盘内部使用持久缓存虽能解决SMR叠瓦特性导致随机写访问受限,但其在持续随机写入的情景下性能表现很差的问题,设计了一种结合固态硬盘(SSD)的混合瓦记录磁盘(HSWD)结构;使用SSD作为持久缓存,实现了全相联和组相联两种持久缓存到本地存储的映射策略,以及三种持久缓存回收策略——LRU、FIFO和MOST,并通过试验和理论分析分别对比了两种映射策略和三种回收策略。最后,通过测试对比HSWD、SSWD和Flashcache的性能,结果表明,HSWD较SSWD和Flashcache在持续随机写性能上有了明显提升,例如在回放hm0的测试中,HSWD的性能较SSWD提升2.25倍,较Flashcache提升1.32倍。
[Abstract]:This paper analyzes the performance of a new magnetic recording technique, the tile recording system (SMR). The random writing performance is severely limited by the SMR imbricate track layout. Seagate's use of persistent caching inside the disk resolves the problem of limited random write access due to the SMR tile feature, but it performs poorly in the case of continuous random writes. This paper designs a hybrid tile recording disk (HSW D) structure combined with solid state hard disk (SSD), and uses SSD as persistent cache to realize the mapping strategy between fully associative and group associative persistent cache to local storage. As well as three persistent cache recovery strategies, LRULU FIFO and MOST.Through experiments and theoretical analysis, two mapping strategies and three recovery strategies are compared respectively. Finally, the performance of HSWD and Flashcache is compared with that of SSWD and Flashcache. The results show that the performance of HSWD is significantly higher than that of SSWD and Flashcache. For example, in the test of playback hm0, the performance of HSWD is 2.25 times higher than that of SSWD and 1.32 times higher than that of Flashcache.
【作者单位】：中国科学院计算技术研究所;中国科学院大学;
【基金】：863计划(2013AA013205) 中国科学院先导专项基金(XDA06010401);中国科学院重点部署基金(KGZD-EW-103-5(7))资助项目
【分类号】：TP333

【相似文献】