单选题You issue the following RMAN command to set a retention policy on a database： RMANCONFIGURE RETENTION POLICY TO REDUNDANCY 2； What will be the outcome of issuing this command？（）A After two days，a backup will be marked obsoleteB After two days，a backup will be deleted from the mediaC If the RMAN repository has records of two or more recent backups of a file，then older backups will be deleted from the media.D If the RMAN repository has records of two or more recent backups of a file then older backups will be marked obsolete.
单选题
You issue the following RMAN command to set a retention policy on a database： RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2； What will be the outcome of issuing this command？（）
A
After two days，a backup will be marked obsolete
B
After two days，a backup will be deleted from the media
C
If the RMAN repository has records of two or more recent backups of a file，then older backups will be deleted from the media.
D
If the RMAN repository has records of two or more recent backups of a file then older backups will be marked obsolete.
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