Patent ID: 6493725
Filing Date: 2002-12-10
Classification: G06F,Y10S

Abstract:
A database managing device for constituting a database system which includes a plurality of database managing devices and synchronous process means for making a coincidence of corresponding data between databases respectively stored in the plurality of database managing devices which are ready to communicate,said database managing device comprising: at least one database; state information storing means for storing state information indicative of a change in data which occurs in a non-synchronous period between a previous synchronous process and a next synchronous process, said state information storing means storing the state information per data corresponding to data of a database of another party; collision detecting means for detecting in a synchronous process whether data changed in a pair of the corresponding data are plural based on state information of each data of the pair; and priority side deciding means for deciding, when data changed are plural, which of the data should be given a priority before transmitting all contents of the plural data changed so that data contents on a non-priority side are replaced with data contents on a priority side by the synchronous process means.