HIGH-RELIABILITY DATABASE SYSTEM, SYNCHRONIZING METHOD THEREOF, INTERMEDIATING METHOD, INTERMEDIATING DEVICE, AND INTERMEDIATING PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a synchronism maintaining method for a high-reliability database system that always maintains synchronism between database servers even when a plurality of transactions including updating are executed in parallel. PSOLUTION: An intermediating device 20 selects one of a plurality of database servers 10 as a leader and others as followers in advance, and then transmits a processing request received from a client computer 50 only to the leader when receiving the processing request and also transmits the processing request to the followers when receiving a response to the processing request from the leader. PCOPYRIGHT: (C)2009,JPO&INPIT