| 摘要 |
In a database system having a primary server side ( 10 ) and a secondary server side ( 30 ), a high availability data replicator ( 26, 46 ) transfers log entries from the primary side ( 10 ) to the secondary side ( 30 ) and replays the transferred log entries to synchronize the secondary side ( 30 ) with the primary side ( 10 ). R-tree index transfer threads ( 54, 56 ) copy user-defined routines, the user defined index, and index databases deployed on the primary server side ( 10 ) to the secondary server side ( 30 ) and deploy the copied user-defined routines, reconstruct the user-defined index, and copy data pages on the secondary side ( 30 ) to make the user-defined index consistent and usable on the secondary side ( 30 ).
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