P2P系统中基于DHT的文件存储与复制策略的设计  

Design of File Storage and Replication Strategy on DHT Topology

作　　者：张琳[1] 张延园[1] 艾常权[1] 刘海龙[1] 

机构地区：[1]西北工业大学计算机学院,陕西西安710072

出　　处：《计算机应用研究》2006年第9期81-84,共4页Application Research of Computers

基　　金：陕西省自然科学基金资助项目(2003F03)

摘　　要：基于一个具有良好扩展性与通用性的DHT文件存储和共享系统,结合传统的数据复制技术,在充分考虑P2P网络的异构性前提下,设计了一种自组织的文档存储策略和一种结合节点综合性能的自适应的最多请求者与最近最少访问相结合的复制策略。这两种策略结合使用,能够保证文档存储的可靠性、共享信息的高效可用性,并可自动调整网络的负载平衡状况,保证网络的可扩展性与稳定性。Fully considered the characteristics of P2P network, which are heterogeneity and high dynamic, and applied the advantages of existing data replication techniques, a self-organizing document storage strategy and a self-adaptive replication strategy are designed. Specially, the self-adaptive replication strategy takes account of the node＇ s general performance and combines the most query strategy and the LRQ （ Least Recent Query） strategy. Furthermore, the combination of these two strategies can effectively improve the reliability of the storage objects and the availability of the sharing information. In addition, the balance of the system load can be effectively and dynamically adjusted, and the scalability and stahility of the system are further guaranteed. The design will be applied to a DHT topology based file storage and sharing system with good scalability and compatibility.

关 键 词：DHT 存储策略 复制策略 异构性 负载平衡 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]