PeerIS:基于Peer-to-Peer的信息检索系统

PeerIS: A Peer-to-Peer Based Information Retrieval System

介绍了对等计算(peer-to-peer,简称 P2P)的特征、潜在优势和应用范围,指出了当前 P2P 数据共享系统(甚至缺乏语义)和粗粒度(文件水平)共享等局限性.针对这种现状,提出了基于 P2P 的信息检索,既可充分发掘 P2P 技术的潜在优势,克服传统信息检索系统的可伸缩瓶颈等问题,又可实现 P2P 数据共享系统语义丰富和细粒度的信息检索与共享;并开发出 PeerIS:基于 P2P 的信息检索系统.描述了 PeerIS 的整体构架与节点的内部结构;重点阐述了 PeerIS 的通信机制、自配置机制、查询机制以及自适应路由机制等实现关键技术;并用实验证明了 PeerIS 的优异性.

The emerging P2P computing is first briefly introduced, including its distinct features, potential merits and applications, and the problems from which the existing P2P-based data sharing systems are suffering are further point out. To address these problems, the concept of P2P-based information retrieval is proposed, which can not only exploit the potential merits of P2P to overcome the problems of traditional information retrieval systems (e.g., lacking of scalability), but also achieve fully semantic retrieval and sharing in the context of P2P systems. Based on the ideology, PeerIS, a P2P-based information retrieval system is developed. Then, the architecture of PeerIS and its peers' components are presented. The key issues of implementation, including communication, semantics-based self-reconfiguration, query processing and self-adaptive routing mechanisms, are described. Finally, an experimental study is used to verify the advantages of PeerIS.