Clone DB same host with ASM

Question

Hello,
I am cloning a database running in 11.2.0.3 version with ASM to a new database running in the same version with ASM in the same host.
The OS version is Redhat Linux 5.5.
The source database is SOURCE and the target to clone database is CLONE.
The source database datafiles are in DG_SOURCE diskgroup and the clone database datafiles are in DB_CLONE diskgroup.
After mounting the database source , I am now backing up the source database using this command:
run {
backup as copy database format '+DG_CLONE/CLONE/DATAFILE/%N_%f.dbf';
}This will copy the datafiles to the DG_CLONE which will be the diskgroup of CLONE instance.
I am thinking after that to :
1- startup nomount the clone database with an init.ora modified of the source database.
2- create the controlfile with CREATE CONTROLFILE command,
3- mount the clone instance.
4- run the following script with RMAN;
catalog start with '+DG_CLONE/CLONE/DATAFILE/';
restore database;
switch datafile all; 
recover database;
alter database open resetlogs;I wonder if my steps are correct?
Thanks,
S

Answer 1

DBA wrote:
Hello,
I am cloning a database running in 11.2.0.3 version with ASM to a new database running in the same version with ASM in the same host.
The OS version is Redhat Linux 5.5.
The source database is SOURCE and the target to clone database is CLONE.
The source database datafiles are in DG_SOURCE diskgroup and the clone database datafiles are in DB_CLONE diskgroup.
After mounting the database source , I am now backing up the source database using this command:
run {
backup as copy database format '+DG_CLONE/CLONE/DATAFILE/%N_%f.dbf';
}This will copy the datafiles to the DG_CLONE which will be the diskgroup of CLONE instance.
I am thinking after that to :
1- startup nomount the clone database with an init.ora modified of the source database.
2- create the controlfile with CREATE CONTROLFILE command,
3- mount the clone instance.
4- run the following script with RMAN;
catalog start with '+DG_CLONE/CLONE/DATAFILE/';
restore database;
switch datafile all; 
recover database;
alter database open resetlogs;I wonder if my steps are correct?
Thanks,
S
I do not think you would be able to restore & recover the backup of your SOURCE database to create the CLONE database on the same host using the method you have stated. You can go with the RMAN duplicate command or since you are on 11g, you can go with the RMAN "duplicate from active database" method.
In your method, you would be restoring the backups of SOURCE on the same server where SOURCE exists and this backup would contain the DB NAME as SOURCE which already exists and is running and you cannot restore it on the same server.
You can refer this http://aprakash.wordpress.com/2011/01/24/duplicate-database-using-from-active-database-clause-11gr2/ for duplicate database using "FROM ACTIVE DATABASE" clause
For normal RMAN duplicate, you can refer this
http://www.shutdownabort.com/quickguides/clone_rman.php
http://docs.oracle.com/cd/B19306_01/backup.102/b14194/rcmsynta028.htm