分布式存储系统中的数据高效缓存方法  

An approach to buffering data efficiently in distributed storage systems

作　　者：杨青霖 吴桂勇 张广艳[1] YANG Qinglin;WU Guiyong;ZHANG Guangyan(Department of Computer Science and Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《大数据》2021年第2期147-157,共11页Big Data Research

基　　金：国家重点研发计划资助项目(No.2018YFB0203902);国家自然科学基金资助项目(No.62025203)。

摘　　要：针对典型分布式存储系统存在的写放大、I/O路径过长、响应时延较高等问题,提出了一种基于SSD的分布式存储系统中数据高效缓存方法,采用读写旁路和懒惰缓存的缓存管理策略,以及兼顾最近访问时间和历史访问频率的缓存替换策略,并根据前台工作负载的变化情况,自适应地调整主动回刷脏数据的速率,显著提升了存储系统的读写性能。To address the problems of write amplification,long I/O path,and high access latency in distributed storage systems,an efficient SSD-based caching approach for distributed storage systems was proposed.This approach adopts read/write bypassing and lazy caching methods to manage the cache system,considers last access time and historical access frequency when performing cache replacement,and adjusts the flushing speed according to the foreground workload.It improves significantly the reading and writing performance of storage systems.

关 键 词：分布式存储 分布式数据缓存 读写旁路 懒惰缓存 替换策略 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]