| 摘要 |
Conventionally and generally, a plurality of computers access a database provided in a server. According to the inventions, generally-called full-fledged“parallel DB edit”using computers permanently holding duplicate DBs is presented. Computers exchange edit information on the duplicate DBs, and the duplicate DBs of the computers synchronize with one another. Each of all the relevant PCs takes out the local-edit records in the other PCs in a unique order (such as the order of arrival at the server) and updates the local original DB thereof. The edit information including the same contents is processed in the same order with the same logic, and then the local original DBs are updated. Therefore, the resultant local original DBs of the PCs also synchronize with one another. The synchronization is established not along with real time axis but along the common time axis which is the order of edit records. As a result,“substantially on-line operation”in which edit records are frequently taken in and updated and“substantially off-line operation”involving long update cycles can be mixed-ly carried out.
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