重庆邮电大学学报（自然科学版）2017，Vol.29Issue(5)：688-695,8.DOI:10.3979/j.issn.1673-825X.2017.05.016
基于Chord网络模型的改进数据复制方法
Improved data replication approach based on Chord network model
摘要
Abstract
To solve the high failure rate in data search under the local node failure of the existing replication strategy,a new data replication mechanism called Rd-Chord is proposed.Discrete storage method is employed to deal with the data copies' storage in the relatively decentralized nodes which are Pre-relay nodes of the root node in the Chord network,and thus there are still copies of data available in other regions even if all the nodes in one region or several regions are breakdown.Simultaneously,a basic update strategy and a periodic update strategy for Rd-Chord are presented to maintain the network structure and key migration.In order to verify the superiority of this method,the extensive comparative experiments on the existing predecessor replication,successor replication,and Rd-Chord are carried out,and the experiment results show that Rd-Chord is superior to the other methods in terms of the capability of solving the regional node failure,the searching failure rate of Rd-Chord is also cut down about 10％ but the average searching efficiency is ensured.关键词
P2P网络/Chord模型/数据复制/区域性故障Key words
P2P network/Chord model/data replication/regional fault分类
信息技术与安全科学引用本文复制引用
刘立芳,侯力元,齐小刚..基于Chord网络模型的改进数据复制方法[J].重庆邮电大学学报（自然科学版）,2017,29(5):688-695,8.基金项目
国家自然科学基金(61572435,61472305) （61572435,61472305）
陕西省自然科学基金(2015JZ002,2015JM6311) （2015JZ002,2015JM6311）
浙江省自然科学基金(LZ16F020001) （LZ16F020001）
宁波市自然科学基金(2016A610035) （2016A610035）
空间测控通信创新探索基金(KJCK1608)The National Natural Science Foundation of China (61572435,61472305) （KJCK1608）
The Natural Science Foundation of Shaanxi Province (2015JZ002,2015JM6311) （2015JZ002,2015JM6311）
The Natural Science Foundation of Zhejiang Province (LZ16F020001) （LZ16F020001）
The Natural Science Foundation of Ningbo Province (2016A610035) （2016A610035）
The Space Measurement and Communication Innovation Fund (KJCK1608) （KJCK1608）
