结构化P2P网络一致性维护策略

Consistency maintenance strategy of structured P2P network

一致性维护策略是解决结构化peer-to-peer(P2P)网络中数据可靠性和一致性的关键技术,基于该技术,数据可以在不同时间、不同地域得到有效的管理.然而,不同节点的空间异构性、能力异构性和功能异构性对数据一致性维护提出了挑战.对此,首先介绍结构化P2P网络一致性维护的基本概念和特点,并阐述一致性维护策略设计面临的挑战以及需考虑的性能指标;然后提出一致性维护策略的分类标准和系统模型,根据该分类标准,详细剖析当前一致性维护策略相关的研究工作;最后,讨论结构化P2P网络一致性维护研究的开放性问题,并指出未来研究的方向和重点.

The consistency maintenance strategy is the key technology to solve the reliability and consistency of data in the structured peer-to-peer（P2P） network. Based on this technology, the data can be managed at different time and in different regions effectively. However, the spatial heterogeneity, capacity heterogeneity and functional heterogeneity of different nodes pose challenges to data consistency maintenance. Therefore, this paper introduces the basic concept and characteristics of consistency maintenance in the structured P2P network and dissects the challenges and concerned performance metrics in design of the consistency maintenance strategy. According to the proposed classification criteria and system models, the related research work on consistency maintenance strategy are analyzed in depth. Finally, the problems in consistency maintenance strategy design are discussed to point out future research trends and focuses.