节点在线率和资源热度相关的P2P存储系统副本复制和修复策略

摘要

在半结构化的P2P存储系统结构下,副本是提高数据可用性的有效保证.本文结合资源所在节点的在线率和资源访问的频度来衡量所需要的资源副本数量.它较好地反映了高动态P2P网络中节点的行为特征,并据此设计了冗余数据修复策略.实验表明,设计的方法虽然占用了一定的维护带宽,但是网络中资源的可用率得到了显著提高.%In the semi-structured P2P storage system architecture, replica is the effective assurance to improve data availability. This paper measures the number of replicas according to the Node Online Rate and the frequency value of the resources accessed. It better reflects the node behavior characteristics of highly dynamic P2P networks, and designs a recovery strategy for redundant data. The experimental results show that the design method uses a certain amount of bandwidth for maintenance, but the availability of the resources in the network is significantly enhanced.