Correlation-Aware Replica Prefetching Strategy to Decrease Access Latency in Edge Cloud

作     者：Yang Liang Zhigang Hu Xinyu Zhang Hui Xiao Yang Liang;Zhigang Hu;Xinyu Zhang;Hui Xiao

作者机构：School of Computer Science and EngineeringCentral South UniversityChangsha 410083China School of InformaticsHunan University of Chinese MedicineChangsha 410208China TCM Big Data Analysis Laboratory of HunanHunan University of Chinese MedicineChangsha 410208China 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2021年第18卷第9期

页      面：249-264页

核心收录：

学科分类：08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 

基　　金：the National Natural Science Foundation of China(No.61602525,No.61572525) the Research Foundation of Education Bureau of Hunan Province of China(No.19C1391) the Natural Science Foundation of Hunan Province of China(No.2020JJ5775) 

主　　题：edge cloud access latency replica prefetching correlation-aware access rule 

摘      要：With the number of connected devices increasing rapidly,the access latency issue increases drastically in the edge cloud *** low time-constrained and data-intensive mobile applications require efficient replication strategies to decrease retrieval ***,the determination of replicas is not reasonable in many previous works,which incurs high response *** this end,a correlation-aware replica prefetching(CRP)strategy based on the file correlation principle is proposed,which can prefetch the files with high access *** key is to determine and obtain the implicit high-value files effectively,which has a significant impact on the performance of *** achieve the goal of accelerating the acquisition of implicit highvalue files,an access rule management method based on consistent hashing is proposed,and then the storage and query mechanisms for access rules based on adjacency list storage structure are further *** theoretical analysis and simulation results corroborate that CRP shortens average response time over 4.8%,improves average hit ratio over 4.2%,reduces transmitting data amount over 8.3%,and maintains replication frequency at a reasonable level when compared to other schemes.