• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2011, Vol. 33 ›› Issue (2): 186-190.doi: 10.3969/j.issn.1007130X.2011.

• 论文 • 上一篇    

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

刘志明1,3,沙基昌1,万亚平2,3,阳小华3   

  1. (1.国防科学技术大学信息系统与管理学院,湖南 长沙 410073;2.华中科技大学计算机科学与技术学院,湖北 武汉 430074;3.南华大学计算机科学与技术学院,湖南 衡阳 421001)
  • 收稿日期:2010-07-27 修回日期:2010-11-12 出版日期:2011-02-25 发布日期:2011-02-25
  • 通讯作者: 刘志明 E-mail:nhdxlzm@foxmail.com
  • 作者简介:刘志明(1972),男,湖南浏阳人,博士生,教授,研究方向为分布式计算、知识管理。
  • 基金资助:

    国家863计划资助项目(2009AA01A401);国家自然科学基金资助项目(70671051);教育部创新团队(IRT0725);湖南省教育厅课题(08C756)

Replica Copy and Repair Strategies Combining the Node Online Rate and the Resource Heat for the P2P Storage Systems

LIU Zhiming1,2,SHA Jichang1,WAN Yaping2,3,YANG Xiaohua3   

  1. (1.School of Information Systems and Management,National University of Defense Technology,Changsha 410073;2.School of Computer Science and Technology,Huazhong University of Science and Technology,Wuhan 430074;3.School of Computer Science and Technology,Nanhua University,Hengyang 421001,China)
  • Received:2010-07-27 Revised:2010-11-12 Online:2011-02-25 Published:2011-02-25

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。

关键词: 节点在线率, 资源热度, 副本, 修复策略

Abstract:

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.

Key words: node online rate;resource heat;replica;recovery strategy