Oracle 11g 10g RMAN Duplicate Database Command Using TAG: How to Clone a Database in same server / node


In this scenario our source database is prod9 and destination database Test9. i.e. Target is PROD9, Auxiliary (database to be cloned) is TEST9 and TAG is PROD_DB.
Please see the steps to perform the database cloning.

Step 1
Connect to target database using RMAN and find out the tag details for the particular tag. Note down the SCN details for the tag

$ rman target /

Recovery Manager: Release - Production on Tue Nov 8 00:47:35 2011

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database: PROD9 (DBID=2126123454)

RMAN> list backup tag PROD_DB;

List of Backup Sets

BS Key  Type LV Size       Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
255     Full    18.08M     DISK        00:00:00     17-OCT-11
        BP Key: 255   Status: AVAILABLE  Compressed: NO  Tag: PROD_DB
        Piece Name: +PROD9_FILES/PROD9/backups/PROD9_cf_c-2126123454-20111017-02
        Keep: BACKUP_LOGS        Until: FOREVER
  SPFILE Included: Modification time: 17-OCT-11
  SPFILE db_unique_name: PROD9
  Control File Included: Ckp SCN: 135393380    Ckp time: 17-OCT-11

Step 2

Create or modify existing parameter file for Auxiliary database with following additional parameters. Here the file name is inittest9_clone.ora

If your Auxiliary database is running of Cluster add the following parameter

If your Auxiliary database is running on 11.2.0 then add the folling parameter

Step 3

Add TNS entries to TARGET and RMAN catalog database from the Auxiliary database ORACLE_HOME and make sure the connectivity is working fine.

Step 4
Shutdown the Auxiliary database – TEST9
For RAC:
srvctl stop database –d TEST9
For Normal database
Sqlplus “/ as sysdba”
Shutdown immediate;

Step 5
Start the Auxiliary database(TEST9) instance with nomount option using the new parameter file
$ sqlplus "/ as sysdba"

SQL*Plus: Release Production on Tue Nov 8 00:54:55 2011

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup nomount pfile='/u01/app/oracle/product/11.2.0/dbhome/dbs/inittest9_clone.ora.clone’;
ORACLE instance started.

Total System Global Area 3206836224 bytes
Fixed Size                  2230768 bytes
Variable Size            2214594064 bytes
Database Buffers          838860800 bytes
Redo Buffers              151150592 bytes

Step 6
Connect to RMAN Target as PROD9, RMAN catalog and Auxiliary as TEST9
$ rman target rmanbkup/rman965@PROD9 catalog rman/rman@rmancat auxiliary /

Recovery Manager: Release - Production on Tue Nov 8 00:57:26 2011

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database: PROD9 (DBID=2126123454)
connected to recovery catalog database
connected to auxiliary database: TEST9 (not mounted)

Step 7
Issue the DUPLICATE DATABASE comman on the RMAN prompt using UNTIL SCN and mention the SCN number which we got from the tag in Step#1.
RMAN> duplicate target database to TEST9 until scn 135393380;

Starting Duplicate Db at 08-NOV-11
configuration for DISK channel 2 is ignored
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=652 device type=DISK
.. .. ..
.. .. ..
.. .. ..
.. .. ..

executing Memory Script

database opened
Finished Duplicate Db at 08-NOV-11



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