On Maximum Stability with Enhanced Scalability in High-Churn DHT Deployment

Abstract—When applied in a commercial deployment, DHTbased P2P protocols face a dilemma: although most real-world participants are so unstable that the maintenance overhead is prohibitively high, they must be effectively utilized due to the lack of stable participants. Thus, determining how to leverage unstable nodes to enhance system scalability and then maximize stability in high-churn scenarios becomes a substantial problem. This paper focuses on this topic, and our main findings are two folds: 1) we propose a homogeneous grouping scheme for scalability enhancement. Besides extending system storage capacity by admitting all nodes, it clusters homogeneous nodes together, deploys the inter- and intra-group connections distinctively, and tunes the number of groups, which aims to facilitate search efficiency; 2) we further look into how to maximize stability under this scheme, which is formulated as the problem Maximum Stability of Grouping. It not only proves to be NP-hard, but als...

• Type: Conference
• Year: 2009
• Where: ICPP
• Authors: Junfeng Xie, Zhenhua Li, Guihai Chen, Jie Wu
• Keywords: Distributed And Parallel Computing, Homogeneous Grouping Scheme, ICPP 2009, Leverage Unstable Nodes, Storage Capacity