一种基于超级节点的半分布式P2P系统改进策略  

AN IMPROVEMENT ON PARTIALLY DECENTRALIZED P2P SYSTEMS BASED ON SUPER NODES

作　　者：廖小伟[1] 王敏[2] 王晓国[1] 

机构地区：[1]同济大学计算机科学与技术系,上海201804 [2]中国石油管道公司沈阳输油分公司,辽宁沈阳110031

出　　处：《计算机应用与软件》2007年第11期139-141,166,共4页Computer Applications and Software

摘　　要：基于半分布式结构的P2P系统,兼有集中式和分布式结构的优点,具有良好的管理性和扩展性,市场上应用非常广泛。但由于网络中超级节点易受攻击,网络不稳定,而且该结构采用Gnutella网络的查询信息泛洪机制,造成了严重的网络带宽负担。提出了一种将数个超级节点组合在一起构成超级节点组的改进的半分布式P2P网络模型,平衡了网络负载,并且可以在很小的跳数内访问到网络中的绝大多数节点,不会产生过多的消息,节省了带宽,避免网络拥塞。P2P systems based on partially decentralized structure, absorbing both the merits of central and distributed structure, and having good characteristics of management and extension have a wide application in the market. But the super nodes in the network are vulnerable, which makes the network unstable. Furthermore, the communication between super nodes depends on the broadcast flooding mechanism, which leads to the overload of the network with a large quantity of messages. A partially distributed network model is presented, which puts several super nodes together to constitute a super node group. The improved model balances the network load, and most of the super nodes in the network can be reached with a few hops. Messages will not be created in large quantity, so that much bandwidth is saved, and network jam is avoided.

关 键 词：端对端 超级节点 半分布式 度幂率分布 消息转发 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]