Assumed Source database names:

Host: SUN1
Primary Database SID: PROD
Data file mount Point: /DB/PROD

Assuming Target Database:

 Host: SUN1

Primary Database SID: CLONE
Data file mount Point: /DB/CLONE

Step 1 Take RMAN backup of Production backup

++++++++++++++ Backup Scripts+++++++++++++++++++

run

{

allocate channel d1 type disk MAXPIECESIZE 5G;

allocate channel d2 type disk MAXPIECESIZE 5G;

backup full tag full_db format '/export/home/oracle/db_%t_%s_p%p'(database);

backup format '/export/home/oracle/ctl_%U' current controlfile;

SQL 'ALTER SYSTEM ARCHIVE LOG CURRENT';

BACKUP format '/export/home/oracle/Arch_%U' (ARCHIVELOG ALL);

release channel d1;

release channel d2;

}

++++++++++++++End Backup Script+++++++++++++++++

Step 2 If your Primary database using Spfile , then create pfile.

SQL> create pfile from spfile.

Note: This will generate initPROD.ora file

Step3 Rename initPROD.ora to initCLONE.ora file and update bellow parameter:

DB_NAME=PROD to CLONE

CONTROL_FILES=’/DB/CLONE’

DB_FILE_NAME_CONVERT=(‘/DB/PROD/’,’/DB/CLONE/’)

LOG_FILE_NAME_CONVERT=(‘/DB/PROD/’,’/DB/CLONE/’)

Step4 Startup Clone Instance with Nomount option

Export ORACLE_SID=CLONE

Sqlplus /nolog

Conn / as sysdba

Startup nomount

Step5 invoke RMAN

$ rman target sys/anup123@prod auxiliary /

Step 4 Execute bellow mention command on RMAN prompt.

RMAN> duplicate target database to “CLONE”;