rman nocatalog { backup as backupset database; backup as backupset archivelog all not backed up; } 假如现在有10天的backup of database和10天的backup of archivelog 还有10天的archivelog 现在用delete obsolete,retention policy是1天 rman会删除? a.前9天的backup of database b.前9天的backup of database+前9天的backup of archivelog c.前9天的backup of database+前9天的backup of archivelog+前9天的archivelog
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