摘要： 提出了一种基于P2P覆盖网络的数据网格副本定位机制。该机制采用Chord算法将位于副本定位服务顶层的全局副本目录节点组成一个P2P覆盖网络，从而起到均衡负载、提高性能的目的。分析和实验表明，该文提出的机制具有良好的性能、可扩展性、灵活性和可靠性，具有较好的实用价值。

关键词: 副本定位, 网格, P2P, Chord

Abstract: This paper proposes a P2P overlay network based replica location mechanism in data grid. It organizes the global replica index nodes which are at the top level of replica location service into a P2P overlay network by Chord in order to achieve load balance and performance improvement. It argues that the proposed mechanism has the following benefits: low query latency, good scalability, reliability and adaptability.

Key words: Replica location, Grid, P2P, Chord

中图分类号: 

• TP393