中文摘要：

现有评价机制不能准确评估结构化对等网络冗余存储策略，因此，引入数据抗毁性这一评价指标，从全复制、分块复制和有中心节点的分块复制三个角度对数据抗毁性进行建模分析。在此基础上，提出了一种基于动态中心确认机制的数据存储策略（DCDS）。实验证明，该策略在网络节点不断失效的情况下，对提高网络中可用数据的数量是有效的。

英文摘要：

The existing evaluation is not accurate to redundant storage strategies of structured peer-to-peer（P2P） networks. Hence, introduced a new evaluation data invulnerability, which was irrelative about the node availability. After that, this dis- sertation modeled the data invulnerability through three perspectives： replication, blocking replication, blocking replication based on a fixed central point. Based on the proposed data invulnerability, this paper proposed a dynamic center-based data storage （DCDS） strategy. Simulation results show that the DCDS strategy can increase the number of data in networks effi- ciently on the premise of node failure continuously.