Minimizing the cost of periodically replicated systems via model and quantitative analysis
Chenhao ZHANG, Liang WANG, Limin XIAO, Shixuan JIANG, Meng HAN, Jinquan WANG, Bing WEI, Guangjun QIN
Minimizing the cost of periodically replicated systems via model and quantitative analysis
Geographically replicating objects across multiple data centers improves the performance and reliability of cloud storage systems. Maintaining consistent replicas comes with high synchronization costs, as it faces more expensive WAN transport prices and increased latency. Periodic replication is the widely used technique to reduce the synchronization costs. Periodic replication strategies in existing cloud storage systems are too static to handle traffic changes, which indicates that they are inflexible in the face of unforeseen loads, resulting in additional synchronization cost. We propose quantitative analysis models to quantify consistency and synchronization cost for periodically replicated systems, and derive the optimal synchronization period to achieve the best tradeoff between consistency and synchronization cost. Based on this, we propose a dynamic periodic synchronization method, Sync-Opt, which allows systems to set the optimal synchronization period according to the variable load in clouds to minimize the synchronization cost. Simulation results demonstrate the effectiveness of our models. Compared with the policies widely used in modern cloud storage systems, the Sync-Opt strategy significantly reduces the synchronization cost.
periodic replication / consistency maintenance / synchronization cost / synchronization strategy
Chenhao Zhang received the BS degree in Internet of Things engineering from China University of Petroleum, China in 2019. He is currently pursuing a PhD degree in computer science at Beihang University, China. His main research interests include distributed file systems, storage system, and high performance computing
Liang Wang received the BEng and MSc degrees in electronics engineering from Harbin Institute of Technology, China in 2011 and 2013, respectively, and the PhD degree in computer science and engineering from The University of Hong Kong, China in 2017. He is currently an assistant professor with the School of Computer Science and Engineering, Beihang University, China. He was a postdoctoral research fellow in the Institute of Microelectronics, Tsinghua University, China during 2017 and 2020. His research interests include power-efficient and reliability-aware design for network-on-chip and many-core system
Limin Xiao received the BS in computer science from Tsinghua University, China in 1993, the MS and PhD degree in computer science from the Institute of Computing, Chinese Academy of Sciences, China in 1996 and 1998, respectively. He is a professor of the School of Computer Science and Engineering, Beihang University, China. He is a senior membership of China Computer Federation. His main research areas are computer architecture, computer system software, high performance computing, virtualization and cloud computing
Shixuan Jiang received his BS degree in computer science and technology from Beihang University, China in 2020. He is currently pursuing a Master degree in computer science at Beihang University, China. His research interests include distributed file system, storage system
Meng Han received the BS degrees in Computer Science from the Beijing University of Posts and Telecommunications, China in 2019. He is currently working toward the PhD degree in Computer Architecture with the School of Computer Science and Engineering, Beihang University, China. His research interests include computer architecture and deep learning accelerator
Jinquan Wang received the BS in software engineering form Hunan University, China in 2021. He is currently pursuing a PhD degree in computer architecture at Beihang University, China. His main research interests include hybrid storage systems, distributed storage systems and scheduling system
Bing Wei received the BS in electrical engineering and MS degrees in computer science from Capital Normal University, China in 2012 and 2015, respectively, He is currently pursuing a PhD degree in computer science at Beihang University, China. His main research interests include file systems, high performance computing, software engineering, and clusters
Guangjun Qin received the MS degree in computer application technology in Zhengzhou University, China in 2006 and the PhD degree in computer architecture from Beihang University, China in 2015. From 2015 to 2017, he was a postdoctoral fellow at Beihang University, China. Since 2017, he has been a lecturer of the Smart City College, Beijing Union University, China. His main research areas are computer architecture, information security, bigdata analysis
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