一种可动态配置的分布式内存池缓存一致性机制  

A Reconfigurable Cache Consistency Mechanism for Distributed Memory Pool

作　　者：段卓辉 刘海坤[1,2,3,4] 赵金玮[1,2,3,4] 刘一航 廖小飞 金海[1] Duan Zhuohui;Liu Haikun;Zhao Jinwei;Liu Yihang;Liao Xiaofei;Jin Hai(National Engineering Research Center for Big Data Technology and System(Huazhong University of Science and Technology),Wuhan 430074;Services Computing Technology and System Lab(Huazhong University of Science and Technology),Ministry of Education,Wuhan 430074;Cluster and Grid Computing Lab(Huazhong University of Science and Technology),Wuhan 430074;School of Computer Science and Technology,Huazhong University of Science and Technology,Wuhan 430074)

机构地区：[1]大数据技术与系统国家地方联合工程研究中心(华中科技大学),武汉430074 [2]服务计算技术与系统教育部重点实验室(华中科技大学),武汉430074 [3]集群与网格计算湖北省重点实验室(华中科技大学),武汉430074 [4]华中科技大学计算机科学与技术学院,武汉430074

出　　处：《计算机研究与发展》2023年第9期1960-1972,共13页Journal of Computer Research and Development

基　　金：国家重点研发计划项目(2022YFB4500303);国家自然科学基金项目(62072198,61825202,61929103)。

摘　　要：在分布式内存系统中,缓存是减少远端内存访问开销的一种有效手段.然而,单一的缓存一致性保证机制往往不能高效适配不同类型负载的访存特性.为此,面向分布式异构内存池系统,设计了基于目录和基于广播相结合的混合缓存一致性保证机制.利用四象限矩阵分析方法,对每个数据对象进行访存模式的判定分析,并为其配置最高效的缓存一致性保证策略,并且可以根据对象访存特征的变化在2种策略之间动态切换.实验结果表明,相比使用单一的缓存一致性保证机制,采用可动态配置的混合缓存一致性保证机制可提升分布式异构内存池系统的读和写,性能平均达32.31%和31.20%.此外,混合的缓存一致性保证机制在客户端数量不断增加时仍然表现出良好的可扩展性.In distributed memory systems,caching is an effective way for reducing the latency of remote memory accesses.However,a single cache consistency mechanism often fails to efficiently adapt to the access behaviors of various workloads.We propose a hybrid and reconfigurable cache consistency mechanism for distributed heterogeneous memory pool systems,which has advantages of both directory-based and broadcast-based cache consistency mechanisms.We use the four-quadrant matrix analysis method to analyze the access pattern of each object,and then adopt the most efficient cache consistency mechanism.Moreover,the adopted cache consistency mechanism can be dynamically shifted to another mechanism based on the change of memory access pattern.Experimental results show that the reconfigurable hybrid cache consistency mechanism can improve the read and write performance of distributed heterogeneous memory pool systems by 32.31%and 31.20%on average,respectively,compared with a single cache consistency mechanism.Moreover,the hybrid cache consistency mechanism shows good scalability when the number of clients increases.

关 键 词：分布式异构内存池 分布式缓存机制 分布式一致性协议 基于目录的缓存一致性 基于广播的缓存一致性 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]