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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。介绍了结构化P2P网络一致性维护的基本概念和特点,并阐述了一致性维护策略设计面临的挑战以及应考虑的性能指标。提出了一致性维护策略的分类标准和系统模型,根据该分类标准,详细剖析了当前一致性维护策略相关的研究工作。最后,讨论了结构化P2P网络一致性维护研究的开放性问题,以及为未来的研究指出可能的方向和重点。
Consistent maintenance strategy is the key technology to solve the data reliability and consistency in structured peer-to-peer (P2P) networks. Based on this technology, data can be effectively managed at different times and in different regions. However, spatial heterogeneity, capability heterogeneity and functional heterogeneity of different nodes pose challenges to data consistency maintenance. The basic concepts and features of structured P2P network consistency maintenance are introduced. The design challenges of consistent maintenance policy design and the performance indexes to be considered are also discussed. The classification standards and system models of consistency maintenance strategy are proposed. According to the classification criteria, the related research work of current consistent maintenance strategy is analyzed in detail. Finally, the openness of the research on the consistency maintenance of structured P2P networks is discussed, and the possible directions and focuses for the future research are pointed out.