Patent ID: 7599967
Filing Date: 2009-10-06
Classification: G06F,Y10S

Abstract:
1. A method practiced in a standby database system, the standby database system including a processor that has access to non-persistent storage and to persistent storage and the method comprising the steps performed by the processor of: receiving a redo item belonging to a stream thereof produced by a primary database system: writing the received redo data item to the non-persistent storage; acknowledging the receipt of the received redo data item to the primary database system; writing the received redo data item from the non-persistent storage to a log file for the stream in the persistent storage when an end of redo event for the stream occurs in the standby database system, writing any remaining received redo data items for the log file in the non-persistent storage to the log file: and when there is otherwise no gar in the stream, thereupon setting no data loss data in the log file to indicate that there is no gar in the stream, whereby the time required to acknowledge the received redo data item to the primary database system is reduced.