| 摘要 |
A computer receives a database request to be executed on a source database or a target database. The source database is configured to efficiently process database queries of a first query type, the target database is configured to efficiently process database queries of a second query type, data changes in the source database are asynchronously replicated to the target database, and all changed data in the source database impacting a result of the database request are replicated to the target database before executing the database request. The computer determines a latency time to asynchronously complete a replication of unreplicated data changes and determines a velocity of replication. The computer predicts, using the latency time and velocity of replication, which of the databases will complete an execution of the database request first and dispatches the database request to the database predicted to complete the execution of the database request first. |
