近几年来P2P网络系统由于其出色的数据共享功能和数据传输效率得到飞速的发展。特别在具有海量数据的地理信息系统中,P2P网络以其利用客户资源协同的组策略可以有效提高当前整个索引系统的性能。文中将针对当前组策略节点选择的不足之处,提出一种适用于P2P空间矢量数据索引网络客户组成员节点优化加入算法和相适应的节点动态替换算法。在综合了索引网络节点时延、带宽的基础上,加入可调权值在这两者之间进行平衡,最后得出节点的性能指标并实现算法。仿真结果表明该策略可以优化客户组成员的组成结构,从而提高空间索引网络的性能。%In recent years P2P network system developed rapidly because of its excellent data sharing ability and rapid data transfer effi-ciency. Especially with a massive data in geographic information system,the performance of the entire index system can be optimized effi-ciently by P2P network group strategy with the use of customer resources. For the disadvantage of group strategy node selection is dis-cussed,a node optimal join algorithm that applied to group member on index network of P2P spatial vector data and a node dynamic re-placement algorithm adapted to the strategy are proposed in this paper. In comprehensive consideration of nodes’ delay and bandwidth on index network,the two metric can be balanced by an adjustable weight,then the performance index of nodes is obtained and the algorithm is realized. Experimental results show that the customer group structure can be optimized by the strategy,and the performance of spatial index network can be improved.
展开▼
