基于闪存固态盘的存储系统性能优化关键技术综述  

A survey of techniques for improving performance of flash SSD based storage systems

作　　者：李天祥 蒋德钧 熊劲[1,2] LI Tianxiang;JIANG Dejun;XIONG Jin(State Key Laboratory of Computer Architecture,Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049;Pengcheng Laboratory,Shenzhen 518055)

机构地区：[1]中国科学院计算技术研究所计算机体系结构国家重点实验室,北京100190 [2]中国科学院大学,北京100049 [3]鹏城实验室,深圳518055

出　　处：《高技术通讯》2023年第1期50-62,共13页Chinese High Technology Letters

基　　金：中国科学院战略性先导科技专项(XDB44030200);北京市自然科学基金-海淀原始创新联合基金(L192038);中国科学院青年创新促进会和鹏城实验室重大项目(PCL2021A08)资助。

摘　　要：闪存固态盘(SSD)具有高并行性、复杂的内部事务以及具有计算能力等特性。现有的存储系统是针对磁盘设计的,无法充分利用闪存固态盘的性能。本文介绍闪存固态盘给现有存储系统带来的问题与挑战,并从提高系统总带宽、减少固态盘内部事务对性能的影响、性能服务质量保证与利用固态盘的计算能力4方面阐述其性能优化关键技术,最后讨论了基于闪存固态盘的存储系统的发展方向。本文归纳指出,软硬件协同的设计方式是优化基于闪存固态盘的存储系统的发展趋势,软硬件协同设计有助于提供可预测的性能及可控的端到端延迟。Flash-based solid state drives(SSDs)are characterized by high parallelism,complex internal background ac-tivities and computing capability,while existing storage systems are designed for hard disk and cannot take full ad-vantage of the performance of flash-based SSDs.This paper introduces the problems and challenges of flash SSD based storage systems,and the related techniques are described from four aspects:improving the total bandwidth of the system,reducing the influence of internal activities on performance,guarantee the quality of service of perform-ance,and utilizing the computing capability of SSD.Finally,the unresolved technique issues of current flash SSD based storage systems are discussed.This paper concludes that the software/hardware co-design approach is a trend for SSD-based storage system,and this approach helps to provide more predictable performance and controllable end-to-end latency.

关 键 词：闪存固态盘(SSD) 输入输出(IO)性能 垃圾回收 服务质量保证 计算任务卸载 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]