Oracle OCP 1Z0-053 Q706(Rman Retention Policy)

706. You execute the following command to set the redundancy retention policy in Recovery Manager
(RMAN):
RMAN> CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
Identify the statement that correctly describes the implications of this command.
A, when there are already three backups, for the fourth backup RMAN removes the oldest backup.
B. When there are already three backups, for the fourth backup RMAN marks the oldest backup as
obsolete.
C. the number of backups that are retained is equal to three and it includes full, incremental, and
cumulative backups.
D. when there are already three backup, one of the existing backups must be removed manually before
taking the fourth backup.
Answer:B

obsolete的備份並不會被自動刪除，除非執行：delete obsolete

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