| 摘要 |
PROBLEM TO BE SOLVED: To improve the reliability of a distributed database system which comprises a master database and a slave database storing a duplicate.SOLUTION: When detecting asynchronization with another server on the basis of a communication state, a server 1 constituting a distributed database system notifies a client 2 of the asynchronized server. The client 2 holds a management table for managing the synchronization/asynchronization states of all servers, records the asynchronization state notified in the management table, and accesses only servers which are in the synchronization state. |
