明白了RMAN的一些疑问PLUS ARCHIVELOG RMAN做了哪些动作？

 

我学习RMAN过程中遇到一些疑问，今天看了网上几片文章，总算明白些

当指定PLUS ARCHIVELOG RMAN做了哪些动作？

when plus archivelog is specified ,rman performs the follow actions in sequential order;
1.runs ALTER SYSTEM ARCHIVE LOG CURRENT.
2.runs BACKUP ARCHIVELOG ALL.
3.backup the files specified in the BACKUP COMMAND.
4.runs ALTER SYSTEM ARCHIVE LOG CURRENT.
5.backup any remaining archived redo logs generated during backup.

If backup optimization is enabled, then RMAN skips backups of archived logs that have already been backed up to the allocated device