Database managing system

Abstract

Information processing devices each creates a dirty bit indicative of the presence or absence of update per tip in a sharing region, and updates the dirty bit in accordance with an operation on the tip. A synchronize processing section compares dirty bits of corresponding tips in a synchronous process so as to judge whether the tips have been updated in the both parties. When there is an update in the both parties, a priority side is decided in accordance with a predetermined rule, for example, such as the promoting side of the synchronous process before transmitting the entire contents of the tips. Further, the synchronous processing section sends the contents of the tip on the priority side to the information processing device on the non-priority side so as to replace the contents of the tip on the non-priority side, thereby realizing a database managing device capable of carrying out the synchronous process with a small effort and a small amount of communications data without increasing the size of the database even when plural data corresponding to each other are independently updated.