非结构化P2P网络中的副本管理策略

Replication Management Mechanism in Unstructured P2P Network

为利用一种动态的副本管理机制,改善P2P网络中数据的可用性和可靠性,提出一种基于趋势预测的动态副本管理机制,通过引入经济学中的时间序列平滑算法预测热点文件,并使用3种不同的策略分别对副本的放置、删除、替换等操作进行动态管理。模拟实验和对相关数据的分析证明,该项研究能有效提高P2P网络中资源搜索的命中率,降低整个网络的开销,使网络中的各个节点达到负载平衡。

How to use a dynamic replication management mechanism to improve the usability and reliability of the data in the network becomes the hot spot of research in recent years. This paper presents a kind of dynamic replication management mechanism based on the trend forecast by using the smoothing arithmetic of time sequence in the economic area to forecast the hot file, and using three different strategies to place, delete, and replace the replica dynamically. It can increase the hit rate in the resource searching efficiently in P2P network, decrease the cost of the whole network, and balance the load of every node in the network through simulation experiments and the analysis of its data.