P2P网络中基于多关键字的信息检索研究

RESEARCH OF MULTI-KEYWORD BASED INFORMATION RETRIEVAL IN P2P NETWORK

P2P网络在信息资源共享方面获得了很大的成功,但是传统的P2P不能兼顾系统的扩展性和基于多关键字信息检索的能力。所提出的P2P模型中,构造了二维索引空间,采用DHT技术实现节点对索引空间的分区管理;依据其内容,文档被映射为索引空间中的多个点,将基于关键字的信息检索转化为在索引空间中寻找特定区域的过程。因此,系统具有很好的扩展性,并对基于多关键字信息检索提供了良好支持。

P2P network has obtained great success in information resource-sharing,but the traditional P2P model can＇t give both consideration to the ability of multi-keyword based information retrieval, and to the scalability that the system needs. A new P2P model is provided. The model introduces a 2D index space. It is split and organized by peers using DHT. The documents are mapped to some points in the index-space due to their content and IDs. The process of information retrieval is transformed to locate the special area in the index-space. Thus, the model is scalable and works well in multi-keyword based information retrieval.