如果索引服务器出现故障，系统会自动转换成全分布式非结构化拓扑结构，大大提高了系统的可靠性。
If the index server fails, the system will automatically convert to the fully distributed unstructured topology. This greatly enhanced the reliability of the system.
非结构化和结构化P 2 P网络是其中的两种基本拓扑类型。
Unstructured and structured P2P networks are two typical topologies in P2P networking.
目前，P 2 P分布式模式中有非结构化和结构化两种基本拓扑类型。
At present, the P2P distributed model has two basic types: unstructured and structured topology.
结构化P2P网络中主要采用分布式哈希（DHT）搜索算法，它查找速度快、效率高，但受网络拓扑结构的限制其应用有限；
DHT (Distributed Hash Table) search algorithms is mainly adopted in the structured P2P network, it works fast and efficiently, but it is also limited by the network topology structure;
结构化p2p网络以其高效路由性能，在应用于搜索时能提供快速的响应时间，适合作为P 2 P搜索的网络拓扑。
Structured P2P topology is appropriate for P2P searching for its high efficiency in routing and short response time in searching.
通过对分布非结构化的搜索算法以及对现有改进算法的研究，参考网络中的小世界性给出了一种基于兴趣域中心节点的P2P网络拓扑结构。
The unstructured P2P systems' searching algorithm and the relative research are studied. And a P2P network topological based on interest domain with central node is given.
通过对分布非结构化的搜索算法以及对现有改进算法的研究，参考网络中的小世界性给出了一种基于兴趣域中心节点的P2P网络拓扑结构。
The unstructured P2P systems' searching algorithm and the relative research are studied. And a P2P network topological based on interest domain with central node is given.
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