如何更改控制文件自动备份的路径

在Oracle10g中，如果我们使用了闪回区，那么控制文件的自动备份会存储在闪回区中。
有时候为了安全，我们需要将控制文件的自动备份转移到其他目录下，这可以使用如下命令。

RMAN> CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/opt/oracle/obak/control%F';

new RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/opt/oracle/obak/control%F';
new RMAN configuration parameters are successfully stored

当然，打开控制文件自动备份需要使用如下命令：

RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON;

new RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
new RMAN configuration parameters are successfully stored

我们建议用户一定要打开这个功能。
现在控制文件的自动备份将指向新的目录：

RMAN> backup datafile 1;

Starting backup at 07-JAN-08
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=12 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=/opt/oracle/oradata/eygle/system01.dbf
channel ORA_DISK_1: starting piece 1 at 07-JAN-08
channel ORA_DISK_1: finished piece 1 at 07-JAN-08
piece handle=/opt/oracle/obak/bkup_3fj5jbqp_1_1 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:36
Finished backup at 07-JAN-08

Starting Control File and SPFILE Autobackup at 07-JAN-08
piece handle=/opt/oracle/obak/controlc-1407686520-20080107-00 comment=NONE
Finished Control File and SPFILE Autobackup at 07-JAN-08

-The End-