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.

• 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。