connect to the CDB RMAN.
Examine the following command and its output
:
RMAN > BACKUP DATABASE PLUS ARCHIVELOG;
Which data files will be backed up?
A. Data files that belong to only the root container
B. Data files that belong to the root container and all the pluggable databases (PDBs)
C. Data files that belong to only the root container and PDB$SEED
D. Data files that belong to the root container and all the PDBs excluding PDB$SEED
Answer: B
Explanation: Backing Up a Whole CDB
Backing up a whole CDB is similar to backing up a non-CDB. When you back up a whole
CDB, RMAN backs up the root, all the PDBs, and the archived redo logs. You can then
recover either the whole CDB, the root only, or one or more PDBs from the CDB backup.
Note:
* You can back up and recover a whole CDB, the root only, or one or more PDBs.
* Backing Up Archived Redo Logs with RMAN
Archived redo logs are the key to successful media recovery. Back them up regularly. You can back up logs with BACKUP ARCHIVELOG, or back up logs while backing up datafiles and control files by specifying BACKUP ... PLUS ARCHIVELOG.
我們需要知道的是，多租戶的數據庫，在進行備份的，只能在整個CDB級別進行備份，不能夠對PDB級別進行備份，而且，即使PDB並沒有在OPEN的狀態，Oracle一樣是可以進行備份的。