元数据在P2P网络下查询改进中的应用

针对P2P网络中由于查询条件的弱语义和粗粒度、检索效率低下以及网络带宽消耗的问题提出了一个基于元数据的高效查询算法,通过在任意P2P数据管理层的基础上建立一个统一的元数据层,各个节点自动抽取共享数据的详细的元数据信息,每个节点不仅保存本地共享数据的元数据信息,而且存储访问过的最感兴趣的数据的元数据信息,并使用数据库对元数据信息进行高效管理,从而使所有节点都具有自我学习的能力,充分利用元数据信息提高检索效率。

Application of Meta Data in Search Improving of P2P Network

Aiming at the low retrieval efficiency and bandwidth consumption problems due to the weak semantic and conditions inquires coarse granularity,an efficient search algorithm was proposed based on meta data,which builds up an unified meta data layer based on any P2P data management.Each node automatically extract of detailed data sharing metadata information,each node not only preserved local share data metadata information,but also storage visited the most interested in the data of the metadata information,and to use the database metadata information effectively management,so that all nodes have self learning ability,make full use of metadata information retrieval effi-ciency was improved.