摘要
超级节点对等网络既可以提高搜索算法的效率,又可以减少由此产生的负载流量,是目前国内外对等网络研究的热点.而超级节点的冗余问题又是该种网络设计的重点问题之一.首先定义了统一的节点负载情况评估参数——资源消耗因子,屏蔽了以往负载评估的不确定性;随后阐述了根据网络负载情况,动态地选取域内轻载节点以及域外其他轻载超级节点作为伙伴节点,进而构成虚拟超级节点共同承担本地负载的算法.并通过试验证明算法对网络负载的变化具有自适应特性,且可用较小的系统开销为代价增加网络的鲁棒性和资源利用率.
A P2P network based on Super-Peers could both improve the efficiency of query algorithms and decrease relevant traffic. It is a hotspot in P2P network research in China and abroad. Eliminating redundant super - peers is one of the important challenges in designing this type of P2P network. First, the proposed method uses a unified load evaluation measure-the resource consumption factor-to replace the uncertainty of former load evaluations. Second, two virtual-super-peer algorithms are put forward in this paper. They are designed to select a lightly loaded peer in a given domain or another super-peer outside of the domain, and then construct a virtual-super-peer by combining a current super-peer and the selected peer, or ＇partner-peer＇. Simulations show that the algorithm increases network self-adaptation to variations in traffic and improves network＇s robustness and resource availability with little overhead cost.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2007年第4期429-433,共5页
Journal of Harbin Engineering University
关键词
超级节点
资源消耗因子
虚拟节点
super-peer
resource consuming factor
virtual peer
