Patent ID: 6212521
Filing Date: 2001-04-03
Classification: G06F,Y10S

Abstract:
A data management system for allowing terminals on a network to register records with search keywords and to retrieve the records by entering a specific search keyword, comprising:a plurality of primary areas which constitute an entire coverage area of the network;a plurality of secondary areas which constitute each of said primary areas;a plurality of secondary servers, one for each secondary area, uniquely identified in each primary area by secondary server identifiers assigned thereto, which store records in a distributed manner to serve the terminals coupled thereto;a plurality of primary servers, one for each primary area, uniquely identified in the network by primary server identifiers assigned thereto, which control storing and retrieving of the records to/from said plurality of secondary servers;primary transformation means, disposed in each primary server, for processing a given search keyword to derive a specific primary server identifier indicating one of said primary servers that governs a particular primary area where the secondary server having a record corresponding to the given search keyword is located; andsecondary transformation means, disposed in each primary server and each secondary server, for processing the given search keyword to derive a specific secondary server identifier indicating one of said secondary servers that is located in the same primary area and has a record corresponding to the given search keyword,wherein a record originated in one of said primary area and accepted by one of said secondary servers is registered in:(a) said secondary server that has accepted the record,(b) a second secondary server that is identified by said secondary transformation means of said accepting secondary server, and(c) a third secondary server in a primary area other than said originating primary area and that is identified by said primary transformation means serving in said originating primary area.