INFORMATION PROCESSING UNIT, INFORMATION COMMUNICATION METHOD, INFORMATION MANAGEMENT METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide: an information processing unit enabling provision of retrieval information to be guaranteed by utilizing retrieval information distributedly stored in a network even if retrieval information of a center server is damaged; an information management method; and a program.

SOLUTION: A first management node and a second management node store added page information or updated page information. A center server SA transmits a page information request message to the first management node or the second management node. The page information request message is a message which causes the center server SA to transmit page information to a node device including the first management node and the second management node. The page information request message is transmitted to the node device, and thereby the center server SA can generate a backup of catalog information.

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