A. Backup retention policy
B. Default backup device type
C. Default destinations for backups
D. Multiple backup device types for single backup
E. Default section size for backups
Answer: ABC
参考：http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmconfb.htm#BRADV8002
题意是：RMAN可以设置的永久配置参数。
RMAN> show all;
使用目标数据库控制文件替代恢复目录
db_unique_name 为 COW 的数据库的 RMAN 配置参数为:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default 答案A
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default 答案B
CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'C:\APPS\ORACLE\PRODUCT\11.2.0\DBHOME_1\DATABASE\SNCFCOW.ORA'; # default
答案C没有找到对应的配置参数，但在BACKUP命令中如果不带FORMAT参数，默认备份是放在FRA区的。
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