基于多层覆盖网络结构的资源发现机制

Grid Resource Discovery Mechanism Based on Multi-layer Overlay Network Structure

资源发现机制是目前网格领域中的一个热点研究问题。对已有的网格资源发现方法进行了分析,指出了这些方法存在的不足,提出了一种基于多层覆盖网络结构的资源发现机制,将具有同一类型资源的网格信息结点组织在一起形成域,把结点数量较多的域通过类型粒度组织成层次形结构。利用类型匹配路由的资源搜索技术将资源发现请求转发到资源所在的域,采用Topk技术在相应的域内找出与请求匹配的最佳的k个资源,从而改善了资源发现的性能,提高了用户的满意度。

Resource Discovery Mechanism is a researched hotspot in grid field at present. The existing resource discovery methods are analyzed, and their insufficiency is pointed out. Focusing on the shortages, a Grid Resource Discovery Mechanism based on Multi-Layer Overlay Network structure is proposed, in which grid information nodes with the same type are organized into regions, and the regions which have lots of nodes are formed hiberarchy by the type granu- larity. The resource discovery request is transmited to the region where the resources have been via the Style Matching Routing Source Searching Technique, then the top k resources suit to the request are located by the Topk Source Searching Technique, accordingly the efficiency of resource discovery is meliorated and the degree of user satisfaction is improved.