本文在深入研究已有负载均衡策略的基础上,提出了一种建立在结构化P2P 上基于Chord 的自适应高可用性混合负载均衡策略——RGP(Replication and Gossip Policy)。该策略结合了流言传播与动态副本策略,并将负载失衡分为轻负载和重负载区分对待,以提高结构化P2P 网络的性能。 关 键 词 结构化P2P;负载均衡;流言传播;副本策略 Abstract According to researching load balancing mechanism existed,a new strategy based on Chord, namely Replication and Gossip Policy(RGP), is proposed. It merges gossip propagation and replication policy, and adopts two different propagation policies to cope with light and heavy overloaded conditions so as to improve performance of networks. Keyword: structure peer-to-peer;load balancing;gossip propagation;replication