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313.What command would you issue to enable automated backups of control files?
A. alter database controlfile autobackup on
B. alter system controlfile autobackup on
C. configure controlfile autobackup on
D. enable controlfile autobackup
Answer: C
答案解析:
RMAN> show all;
RMAN configuration parameters for database with db_unique_name TEST0910 are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
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 '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_test0910.f'; # default
将默认值
CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default
改为
CONFIGURE CONTROLFILE AUTOBACKUP ON就可以自动备份控制文件了。
CONTROLFILE AUTOBACKUP | Controls the control file autobackup feature. Note: You should enable control file autobackup feature when using RMAN without a recovery catalog. |
ON | Specifies that RMAN should perform a control file autobackup in the following circumstances: -
After every BACKUP or CREATE CATALOG command issued at the RMAN prompt. -
Whenever a BACKUP command within a RUN block is followed by a command that is not BACKUP . -
After every RUN block if the last command in the block was BACKUP . -
After structural changes for databases in ARCHIVELOG mode. The autobackup after structural changes does not occur for databases in NOARCHIVELOG mode. |
官方参考:http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta010.htm#i1017491
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