RMAN相关视图

访问RMAN存储库的三种技术详解

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本文介绍了用于访问RMAN（恢复管理器）存储库的三种主要技术：1) 使用RMAN的LIST和REPORT命令进行备份恢复操作；2) 利用手动备份恢复时，通过V$视图直接访问控制文件中的RMAN记录；3) 当数据库注册在恢复目录中时，通过RC_视图直接访问恢复目录中的RMAN数据。V$视图提供了一些LIST和REPORT命令无法获取的信息，而RC_视图则对应于V$视图，用于有恢复目录的情况。

The following table lists the techniques used to access metadata from the RMAN repository.
1)RMAN LIST and REPORT commands：用于RMAN备份恢复，即使用LIST与REPORT命令
2)V$ views：用于手动备份恢复，详细见手动备份恢复部分
When the database is open, several V$ views provide direct access to RMAN repository records in the control file of each target database. Example: V$BACKUP_PIECE, V$BACKUP_SET
In some cases, V$ views supply information that is not available through use of the LIST and REPORT commands. Some V$ views such as V$DATAFILE_HEADER, V$PROCESS, and V$SESSION contain information not found in the recovery catalog views.
3)RC_ views：用于使用catalog
If your database is registered in a recovery catalog, then RC_ views provide direct access to the RMAN repository data stored in the recovery catalog. The RC_ views mostly correspond to the V$ views.