基于超级节点的P2P模型副本管理策略  

Replica Management Strategy of P2P Model Based on Super Nodes

作　　者：赵英[1] 李侠[1] 

机构地区：[1]北京化工大学网络中心,北京100029

出　　处：《现代电子技术》2009年第13期100-102,112,共4页Modern Electronics Technique

基　　金：教育部重点科学技术研究项目"时钟同步状态图的研究"(106021)

摘　　要：随着计算机和网络技术的迅猛发展,对大容量分布式存储系统的研究已经成为当前热点。在分布式存储系统中,副本技术是一种最为常用的分布式数据管理机制。通过为系统中的文件增加副本,保存冗余的文件数据,可以十分有效地提高文件的可用性和可靠性。提出一种含超级节点的P2P模型,将大量分散的存储节点组织成一个逻辑存储网络。超级节点不仅用于存储"热点"文件的副本,而且还采用RAID技术进行数据备份,以进一步提高系统存储资源利用率和系统可靠性;针对一般节点的惰性,依据文件被查询到的概率,采用方根复制策略进行数据备份,在保证资源下载成功率的同时,进一步提高系统空间利用率。With the development of computer and network technology, research on the distributed high capacity storage system becomes hot spot. Replica technique is a kind of distributed data management widely used in the distributed system. It is very effective in improving the availability and reliability of documents through increasing the replica of files for redundancy. A Hybrid P2P with super nodes, which organizes large numbers of nodes separated in Internet into united overlay network. In order to improve the efficiency and reliability of storage resource, the system not only deposits ＂hotspots＂ file on the super nodes, but also uses RAID technique to back- up files. With the general inertia of the nodes, according to the searching probability of documents,the views of square- root replication strategy for data backup is presented in order to download resources successfully and improve space utilization rate.

关 键 词：分布式存储 P2P 备份 RAID 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]