Distributed document retrieval method and device, and distributed document retrieval program and recording medium recording the program

摘要

A distributed document retrieval method for performing document retrieval by plural retrieval servers that each perform document retrieval for a database storing plural documents, and an integrating retrieval server that is connected to the plural retrieval servers over communication and issues retrieval orders to the retrieval servers, wherein each retrieval server delivers statistical information created based on intermediate results obtained by retrieval operation to the integrating retrieval server, the integrating retrieval server compiles the statistical information to create global statistical information and delivers it to each retrieval server, and each retrieval server calculates scores based on the global statistical information and sends retrieval results matching retrieval conditions back to the integrating retrieval server. By the above described operation, efficient and correct ranking among retrieval documents is achieved with improved document retrieval quality.