Create a standby controlfile using cold backup

Question

Hi All,
We have to setup a DR for a production database.
Here we have the coldbackup which backups all the datafiles and the control file from the production database.
For cloining we generally copy them to another instance and then create controlfile manually. But for setting up as a DR , we would be creating it for standby controlfile.
I tried to google but I am not able to find a way to create a standby controlfile from the existing controlfile cold backup.
OS version solaris 10 , database version 11.2.0.1
Regards
KK
Edited by: Kk on Feb 16, 2012 8:51 AM

Answer 1

Kk wrote:
Hi All,
We have to setup a DR for a production database.
Here we have the coldbackup which backups all the datafiles and the control file from the production database.
For cloining we generally copy them to another instance and then create controlfile manually. But for setting up as a DR , we would be creating it for standby controlfile.
I tried to google but I am not able to find a way to create a standby controlfile from the existing controlfile cold backup.
OS version solaris 10 , database version 11.2.0.1
Regards
KK
Edited by: Kk on Feb 16, 2012 8:51 AMTry as below
My version:
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL>1) Taken backup of current controlfile
2) Deleted Current controlfiles
3) Restored using standby clause from current controlfile
4) Mounted & now controlfile type is Standby
Try in this way when you have cold backup. :)
SQL> select controlfile_type from v$database;
CONTROL
CURRENT
RMAN> run
2> {
3> allocate channel ch1 device type disk format 'c:\oracle\control%U.bkp';
4> backup current controlfile;
5> release channel ch1;
6> }
using target database control file instead of recovery catalog
allocated channel: ch1
channel ch1: SID=63 device type=DISK
Starting backup at 16-FEB-12
channel ch1: starting full datafile backup set
channel ch1: specifying datafile(s) in backup set
including current control file in backup set
channel ch1: starting piece 1 at 16-FEB-12
channel ch1: finished piece 1 at 16-FEB-12
piece handle=C:\ORACLE\CONTROL08N3GEA6_1_1.BKP tag=TAG20120216T230334 comment=NONE
channel ch1: backup set complete, elapsed time: 00:00:01
Finished backup at 16-FEB-12
released channel: ch1
RMAN> exit
RMAN> restore standby controlfile from 'C:\ORACLE\CONTROL08N3GEA6_1_1.BKP';
Starting restore at 16-FEB-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=66 device type=DISK
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:03
output file name=C:\ORACLE\ORADATA\ORCL\CONTROL01.CTL
output file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\CONTROL02.CTL
Finished restore at 16-FEB-12
SQL> alter database mount;
Database altered.
SQL> select controlfile_type from v$database;
CONTROL
STANDBY
SQL>
Some More information:-
Even if your database backup is old, still you can create a new standby controlfile and restore new controlfile and restore database. Later after starting MRP all will be synchronized. No issues
SQL> select controlfile_type from v$database;
CONTROL
CURRENT
SQL> alter database create standby controlfile as 'c:\oracle\control_stby.ctl';
Database altered.
SQL> $dir c:\oracle\con*
Volume in drive C is System
Volume Serial Number is 1853-3E21
Directory of c:\oracle
02/16/2012  11:41 PM         9,748,480 CONTROL_STBY.CTL
               1 File(s)     19,546,112 bytes
               0 Dir(s)  177,185,570,816 bytes free
SQL>Now Just restore database. You already have backup.
Or
If you have opportunity you can go ahead for Duplicate/Duplicate from active database
Edited by: CKPT on Feb 16, 2012 11:41 PM