Oracle 18c-Rman Duplication of a PDB To Another CDB

Oracle 18c-Rman Duplication of a PDB To Another CDB

Description:-

In this article we are going to see Oracle 18c-Rman Duplication of a PDB To Another CDB
It is Available from Oracle 18c

Restrictions on Duplicating PDBS

Only active database duplication is supported.
Only the following clauses of the DUPLICATE command are supported: NORESUME, DB_FILE_NAME_CONVERT, SECTION SIZE, and USING COMPRESSED BACKUPSET.
The following clauses of the DUPLICATE command are not supported: SPFILE, NO STANDBY, FARSYNC STANDBY, and LOG_FILE_NAME_CONVERT.
Duplicating a PDB to a CDB that is a standby database is not supported.
Only one PDB can be duplicated at a time.
Partial PDB duplication is not supported, only complete PDB duplication is supported. For example, you cannot include or exclude specific tablespaces while duplicating a PDB.
Duplicating a non-CDB as a PDB in an existing CDB is not supported.
Duplicating PDBs that contain TDE-encrypted tablespaces is not supported.

Environment Details

Let’s start the Demo:-

Step1:-Prerequisites for active database duplication

Check PDB status on Source side (TESTDB)

SQL> show pdbs

CON_ID         CON_NAME             OPEN MODE          RESTRICTED
---------- --------------------    ----------          ----------
2              PDB$SEED            READ ONLY                 NO
3              PDB2                READ WRITE                NO
4              PDB1                READ WRITE                NO
5              PDB2_COPY           READ WRITE                NO
6              PDB3                READ WRITE                NO

Check PDB status on Target side (DEVDB)

SQL> show pdbs

CON_ID        CON_NAME     OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2            PDB$SEED     READ ONLY      NO
3            DEVPDB2      READ WRITE     NO
4            DEVPDB1      READ WRITE     NO

Creating table for Testing After the clone we will verify the table

[oracle@testdb ~]$ sqlplus '/as sysdba'
SQL*Plus: Release 18.0.0.0.0 Production on Tue Jul 3 08:49:28 2018
Version 18.1.0.0.0
Copyright (c) 1982, 2017, Oracle. All rights reserved.
Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.1.0.0.0

SQL> alter session set container=pdb2;
Session altered.

SQL> create table india (no number);
Table created.

SQL> insert into india values(1);
1 row created.

SQL> commit;
Commit complete.

Step2:-Create the directories that store the duplicate database files on the destination CDB (DEVDB)

[oracle@devdb ~]$ mkdir -p /u02/app/oracle/oradata/devdb/devpdb3/
[oracle@devdb ~]$ mkdir -p /u01/devpdb3
[oracle@devdb ~]$ sqlplus '/as sysdba'

SQL*Plus: Release 18.0.0.0.0 Production on Tue Jul 3 08:48:39 2018
Version 18.1.0.0.0
Copyright (c) 1982, 2017, Oracle. All rights reserved.
Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.1.0.0.0

SQL> alter system set remote_recovery_file_dest='/u01/devpdb3';
System altered.

SQL> exit
Disconnected from Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.1.0.0.0

Step3:-Establish Oracle net connectivity between the source CDB and the destination CDB

[oracle@testdb ~]$ tnsping devdb
TNS Ping Utility for Linux: Version 18.0.0.0.0 - Production on 03-JUL-2018 08:58:54
Copyright (c) 1997, 2017, Oracle. All rights reserved.
Used parameter files:
/u01/app/oracle/product/18.0.0/dbhome_1/network/admin/sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = devdb.compute-604179528.oraclecloud.internal)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = devdb.604179528.oraclecloud.internal)))
OK (0 msec)

[oracle@devdb ~]$ tnsping testdb
TNS Ping Utility for Linux: Version 18.0.0.0.0 - Production on 03-JUL-2018 08:59:47
Copyright (c) 1997, 2017, Oracle. All rights reserved.
Used parameter files:
/u01/app/oracle/product/18.0.0/dbhome_1/network/admin/sqlnet.ora

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = testdb.compute-604179528.oraclecloud.internal)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = testdb.604179528.oraclecloud.internal)))
OK (0 msec)

Step4:-start the Rman Duplication of a PDB To Another CDB

[oracle@testdb ~]$ rman target sys/Chennai#123@testdb auxiliary sys/Chennai#123@devdb

Recovery Manager: Release 18.0.0.0.0 - Production on Tue Jul 3 08:50:40 2018
Version 18.1.0.0.0
Copyright (c) 1982, 2018, Oracle and/or its affiliates. All rights reserved.
connected to target database: TESTDB (DBID=2763264412)
connected to auxiliary database: DEVDB (DBID=885182715)

RMAN> DUPLICATE PLUGGABLE DATABASE PDB2 as DEVPDB3 TO DEVDB DB_FILE_NAME_CONVERT('/u02/app/oracle/oradata/testdb/PDB2/','/u02/app/oracle/oradata/devdb/devpdb3/') FROM ACTIVE DATABASE SECTION SIZE 400M;

Starting Duplicate PDB at 03-JUL-18
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=4 device type=DISK
current log archived
contents of Memory Script:
{
set newname for datafile 22 to
"/u02/app/oracle/oradata/devdb/devpdb3/system01.dbf";
set newname for datafile 23 to
"/u02/app/oracle/oradata/devdb/devpdb3/sysaux01.dbf";
set newname for datafile 24 to
"/u02/app/oracle/oradata/devdb/devpdb3/undotbs01.dbf";
restore
from nonsparse section size
400 m clone foreign pluggable database
"PDB2"
from service 'testdb' ;
}
executing Memory Script
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting restore at 03-JUL-18
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: using network backup set from service testdb
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_AUX_DISK_1: restoring section 1 of 1
channel ORA_AUX_DISK_1: restoring foreign file 22 to /u02/app/oracle/oradata/devdb/devpdb3/system01.dbf
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:16
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: using network backup set from service testdb
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_AUX_DISK_1: restoring section 1 of 2
channel ORA_AUX_DISK_1: restoring foreign file 23 to /u02/app/oracle/oradata/devdb/devpdb3/sysaux01.dbf
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:16
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: using network backup set from service testdb
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_AUX_DISK_1: restoring section 2 of 2
channel ORA_AUX_DISK_1: restoring foreign file 23 to /u02/app/oracle/oradata/devdb/devpdb3/sysaux01.dbf
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:15
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: using network backup set from service testdb
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_AUX_DISK_1: restoring section 1 of 1
channel ORA_AUX_DISK_1: restoring foreign file 24 to /u02/app/oracle/oradata/devdb/devpdb3/undotbs01.dbf
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:03
Finished restore at 03-JUL-18
current log archived
contents of Memory Script:
{
set archivelog destination to '/u01/devpdb3';
restore clone force from service 'testdb'
foreign archivelog from scn 4198374;
}
executing Memory Script
executing command: SET ARCHIVELOG DESTINATION
Starting restore at 03-JUL-18
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: starting archived log restore to user-specified destination
archived log destination=/u01/devpdb3
channel ORA_AUX_DISK_1: using network backup set from service testdb
channel ORA_AUX_DISK_1: restoring archived log
archived log thread=1 sequence=15
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01
channel ORA_AUX_DISK_1: starting archived log restore to user-specified destination
archived log destination=/u01/devpdb3
channel ORA_AUX_DISK_1: using network backup set from service testdb
channel ORA_AUX_DISK_1: restoring archived log
archived log thread=1 sequence=16
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:02
Finished restore at 03-JUL-18
Performing import of metadata...
Finished Duplicate PDB at 03-JUL-18

RMAN> exit

Step5:-Ensure that the destination CDB is open in read-write mode.

SQL> show pdbs

CON_ID            CON_NAME          OPEN MODE RESTRICTED
----------       -----------        ---------    ----------
2                   PDB$SEED       READ ONLY        NO
3                   DEVPDB2        READ WRITE       NO
4                   DEVPDB1        READ WRITE       NO
5                   DEVPDB3        READ WRITE       NO

Check the Table

SQL> alter session set container=DEVPDB3;

Session altered.

SQL> select * from india;

NO
----------
1

Successfully completed the Rman Duplication of a PDB To Another CDB

Reference:-

https://docs.oracle.com/en/database/oracle/oracle-database/18/bradv/rman-duplicating-databases.html#GUID-9E630E2C-3D1B-4594-B738-4B5B43E50C58

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