Patent ID: 6286004
Filing Date: 2001-09-04
Classification: G06F,Y10S

Abstract:
A distributed type of database system comprising:a plurality of first sites each having copied data for an arbitrary object;a second site that is different from the first sites and that is configured to centrally manage consistency of the copied data distributed among said first sites according to management information for managing the object;a one-to-one information transmitting unit configured to transmit, when a transaction is generated in the said first sites, updating permission request information for requiring permission of updating of the copied data for the arbitrary object stored therein from each of said first sites to said second site; anda one-to-many information transmitting unit configured to receive the updating permission request information from said one-to-one information transmitting unit, to determine whether the request for updating is to be permitted by said second site or not according to the received updating permission request information and management information for the object, and to broadcast a result of the determination from said second site to said first sites.