Effect of Switchovers, Failovers, and Control File Creation on Backups

lory

对dataguard 官方文档里面的这句话不理解，能否给出一个例子说明：
10.2.0.5的版本
Effect of Switchovers, Failovers, and Control File Creation on Backups

All the archived redo log files that were generated after the last backup on the system
where backups are done must be manually cataloged using the RMAN CATALOG
ARCHIVELOG 'archivelog_name_complete_path' command after any of the following
events:
■ The primary or standby control file is re-created.
Effect of Switchovers, Failovers, and Control File Creation on Backups
Using RMAN to Back Up and Restore Files 10-3
■ The primary database role changes to standby after a switchover.
■ The standby database role changes to primary after switchover or failover.
If the new archived redo log files are not cataloged, RMAN will not back them up.