Distributed information retrieval by using cooperative meta search engines

Information retrieval is frequently used for the Internet. However, we face the problem that the update intervals of conventional search engines are too long. It is difficult for conventional search engines to make their intervals short because they are based on a centralized architecture. So, we proposed the Cooperative Search Engine (CSE), which is based on a distributed architecture. CSE can realize the shortening of the update interval. In CSE, a large search engine is constructed from multiple local meta search engines that cooperate with each other. CSE can accomplish correct ranking in a distributed fashion because each local meta search engine hides the difference between its local search engine and the others. The article discusses the design and experimental evaluations of CSE.