oracle Redo Logs

The redo log records all changes made to data, including both uncommitted and committed changes. Oracle通過Redo來保證數據庫的事務可以被重演,從而使得在故障之後,數據可以被恢復。在數據庫中,Redo的功能主要通過3個組件來實現:Redo Log Buffer、LGWR後臺進程和Redo Log
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