| 摘要 |
PROBLEM TO BE SOLVED: To shorten write/read time to a data base(DB) as much as possible and to read the latest write data with respect to a data base management system. SOLUTION: A DB system for receiving the write/read requests of data generated from plural request sources at all times and writing or reading them is provided with the two sets of the DBs 100 for respectively storing the same data, a DB management means 101 for managing the write/read state of the respective DBs, a write/read means 102 for referring to the DB management means when the write/read request to the DB is generated and executing write/ read to an optional free DB, an updating contents storage means 103 for tentatively storing updating contents in the case of updating the data stored in one DB and a stored data matching means 104 for executing the same updating processing to the stored data of the other DB as well, based on the already stored updating contents after updating to one DB is ended.
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