rman active database duplication server to server - directory structure is different (11g)...

ACTIVE DATABASE DUPLICATION - DIFFERENT DIRECTORY STRUCTURE

Exploring the Oracle DBA Technology by Gunasekaran , Thiyagu

RMAN ACTIVE DATABASE CLONING RMAN has the ability duplicate a database from a backup or from an active database. Using RMAN

possible to create a duplicate database on a remote server with the same directory structure and

different directory structure or else the local server with a different directory structure.

Oracle 11g has introduced active database duplication, we can create a duplicate of the target

database without any backups. Duplication is performed over the network. Let us do active database

duplication in auxiliary server with different directory structure.

Source server database name : CRMS

Auxiliary server database name : HRMS

Source database path : /u02/app/oracle/oradata/crms/

Auxiliary database path : /u01/app/oracle/oradata/hrms/

SOURCE SERVER 192.168.1.130 (SERVER1.ORACLE.COM) SERVER1 PRODUCTION

AUXILIARY SERVER 192.168.1.131 (SERVER2.ORACLE.COM) SERVER2 DEVELOPMENT

NETWORK AVAILABILITY BETWEEN TWO SERVERS

FROM SOURCE SERVER



FROM THE AUXILIARY SERVER

STEPS TO PERFORM ACTIVE DATABASE DUPLICATION

Configure the network files

Add an entry in tnsnames.ora & listener.ora on the Target server & Auxiliary server.

Create & Edit the initialization parameter file

Create an init.ora from the source database & SCP to the auxiliary server.

Make all necessary changes the new init.ora file as per clone database such as,

Changing db_name = <new_name>, db_domain = <new_name>, etc...

Set new path to control_files, audit_file_dest, diagnostic_dest, db_recovery_file_dest, etc...

If FILE SYSTEM or DIRECTORY NAMING CONVENTION is different, must add below parameters

db_file_name_convert=(‘/source path location’, ’clone path location’)

log_file_name_convert=(‘/source path location’, ’clone path location’)

Create all necessary directories physically in auxiliary server.

Create a Password file (password must be same) for clone & target database.

Start the auxiliary database instance using the init.ora file.

Connect to the Target(source) & Auxiliary (clone) databases in the Target server.

Execute the duplicate command to perform database duplication.



CONNECTING SOURCE DATABASE SYS>select name, dbid from v$database;

NAME DBID

--------- ----------

CRMS 1569424116

SYS>show parameter db_domain;

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

db_domain string server1.com

SYS>show parameter service_names;

NAME TYPE VALUE

------------------------------------ ----------- ----------------------

service_names string crms.server1.com

PARAMETER FILE BACKUP FOR AUXILIARY DATABASE SYS>show parameter pfile;

NAME TYPE VALUE

------- --------- ------------------------------------------------------

spfile string /u02/app/oracle/product/11.2.0/dbhome_1/dbs/spfilecrms.ora

SENDING PFILE TO THE AUXILIARY SERVER

TARGET DATABASE PFILE

crms.__db_cache_size=419430400

crms.__java_pool_size=16777216

crms.__large_pool_size=16777216

crms.__oracle_base='/u02/app/oracle' # ORACLE_BASE set from environment

crms.__pga_aggregate_target=503316480

crms.__sga_target=754974720

crms.__shared_io_pool_size=0

crms.__shared_pool_size=285212672



crms.__streams_pool_size=0

*.audit_file_dest='/u02/app/oracle/admin/crms/adump'

*.audit_trail='db'

*.compatible='11.2.0.0.0'

*.control_files='/u02/app/oracle/oradata/crms/control01.ctl','/u02/app/oracle/flash_recovery_area/crms/control02.ctl'

*.db_block_size=8192

*.db_domain='server1.com'

*.db_name='crms'

*.db_recovery_file_dest='/u02/app/oracle/flash_recovery_area'

*.db_recovery_file_dest_size=4039114752

*.diagnostic_dest='/u02/app/oracle'

*.dispatchers='(PROTOCOL=TCP) (SERVICE=crmsXDB)'

*.log_archive_format='%t_%s_%r.dbf'

*.memory_target=1244659712

*.open_cursors=300

*.processes=150

*.remote_login_passwordfile='EXCLUSIVE'

*.undo_tablespace='UNDOTBS1'

AUXILIARY DATABASE PFILE

hrms.__db_cache_size=419430400

hrms.__java_pool_size=16777216

hrms.__large_pool_size=16777216

hrms.__oracle_base='/u02/app/oracle' # ORACLE_BASE set from environment

hrms.__pga_aggregate_target=503316480

hrms.__sga_target=754974720

hrms.__shared_io_pool_size=0

hrms.__shared_pool_size=285212672

hrms.__streams_pool_size=0

*.audit_file_dest='/u01/app/oracle/admin/hrms/adump'

*.audit_trail='db'

*.compatible='11.2.0.0.0'

*.control_files='/u01/app/oracle/oradata/hrms/control01.ctl', '/u01/app/oracle/flash_recovery_area/hrms/control02.ctl'

*.db_block_size=8192

*.db_domain='server2.com'

*.db_name='hrms'

*.db_recovery_file_dest='/u01/app/oracle/flash_recovery_area'

*.db_recovery_file_dest_size=4039114752

*.diagnostic_dest='/u01/app/oracle'



*.dispatchers='(PROTOCOL=TCP) (SERVICE=hrmsXDB)'

*.log_archive_format='%t_%s_%r.dbf'

*.memory_target=1244659712

*.open_cursors=300

*.processes=150

*.remote_login_passwordfile='EXCLUSIVE'

*.undo_tablespace='UNDOTBS1'

# Below Parameters are used for from where to where the DATAFILES & LOGFILES will be cloned.

db_file_name_convert=('/u02/app/oracle/oradata/crms/', '/u01/app/oracle/oradata/hrms/’)

log_file_name_convert=('/u02/app/oracle/oradata/crms/', '/u01/app/oracle/oradata/hrms/')

If the source database directory structure & clone database directory structure differs, then only

you need to use db_file_name_convert & log_file_name_convert parameters.

CREATE DIRECTORY STRUCTURE FOR AUXILIARY DATABASE

$ mkdir -p /u01/app/oracle/oradata/hrms/

$ mkdir -p /u01/app/oracle/admin/hrms/adump/

$ mkdir -p /u01/app/oracle/admin/hrms/dpdump/

$ mkdir -p /u01/app/oracle/flash_recovery_area/hrms #(for control file)

LISTENER.ORA ON TARGET SERVER 192.168. 1.130

# listener.ora Network Configuration File: /u02/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME=crms)

(ORACLE_HOME = /u02/app/oracle/product/11.2.0/dbhome_1)

# (GLOBAL_DBNAME=crms)

)

)

ADR_BASE_LISTENER = /u02/app/oracle

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL=TCP)(HOST=192.168.241.130)(PORT=1521))

)

)



TNSNAMES.ORA ON TARGET SERVER 192.168.1.130

# tnsnames.ora Network Configuration File: /u02/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora

# Generated by Oracle configuration tools.

CRMSDB =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL=TCP)(HOST=192.168.1.130)(PORT=1521))

) FOR TARGET SERVER

(CONNECT_DATA =

(SERVER=DEDICATED)

(SERVICE_NAME=crms) )

)

HRMSDB =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST=192.168.1.131)(PORT=1521))

(CONNECT_DATA = FOR AUXILIARY SERVER

(SERVER = DEDICATED)

(SERVICE_NAME = hrms) )

)

LISTENER.ORA ON AUXILIARY SERVER 192.168.1.131

# listener.ora Network Configuration File: /u02/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

# Generated by Oracle configuration tools. LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.131)(PORT = 1521))

)

)

ADR_BASE_LISTENER = /u02/app/oracle SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(ORACLE_HOME = /u02/app/oracle/product/11.2.0/dbhome_1)

(SID_NAME = hrms)

)

)



STARTING LISTENER IN AUXILIARY SERVER

$ lsnrctl --- > listener control

LSNRCTL> start listener

Starting /u02/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.1.0 - Production

System parameter file is /u02/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Log messages written to /u02/app/oracle/diag/tnslsnr/SERVER2/listener/alert/log.xml

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.131)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.131)(PORT=1521)))

STATUS of the LISTENER

-----------------------------

Alias listener

Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production

Start Date 06-JAN-2015 00:30:41

Uptime 0 days 0 hr. 0 min. 0 sec

Trace Level off

Security ON: Local OS Authentication

SNMP OFF

Listener Parameter File /u02/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Listener Log File /u02/app/oracle/diag/tnslsnr/SERVER2/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.131)(PORT=1521)))

Services Summary...

Service "hrms" has 1 instance(s).

Instance "hrms", status UNKNOWN, has 1 handler(s) for this service...

The command completed successfully

STARTING LISTENER IN TARGET SERVER

$ lsnrctl start listener

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 06-JAN-2015 00:30:48

Copyright (c) 1991, 2009, Oracle. All rights reserved.

Starting /u02/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.1.0 - Production

System parameter file is /u02/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Log messages written to /u02/app/oracle/diag/tnslsnr/SERVER1/listener/alert/log.xml

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=SERVER1.ORACLE.COM)(PORT=1521))) ***********

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=SERVER1.ORACLE.COM)(PORT=1521)))



STATUS of the LISTENER

------------------------------

Alias listener

Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production

Start Date 06-JAN-2015 00:30:48

Uptime 0 days 0 hr. 0 min. 0 sec

Trace Level off

Security ON: Local OS Authentication

SNMP OFF

Listener Parameter File /u02/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Listener Log File /u02/app/oracle/diag/tnslsnr/SERVER1/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=SERVER1.ORACLE.COM)(PORT=1521)))

Services Summary...

Service "crms" has 1 instance(s).

Instance "crms", status UNKNOWN, has 1 handler(s) for this service...

The command completed successfully

CHECKING TNS CONNECTIVITY ON TARGET SEVER

[oracle@SERVER1 admin]$ tnsping crmsdb TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 06-JAN-2015 01:40:28


Used parameter files:

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS_LIST= (ADDRESS = PROTOCOL= TCP)(HOST = 192.168.1.130)

(PORT = 1521))) (CONNECT_DATA = (SERVER = DEDICATED)(SERVICE_NAME = crms)))OK (20 msec)

[oracle@SERVER1 admin]$ tnsping hrmsdb

TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 06-JAN-2015 01:42:54


Used parameter files:

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS_LIST =(ADDRESS =(PROTOCOL= TCP)(HOST = 192.168.1.131)

(PORT = 1521))) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = hrms)))OK (10 msec)

CONFIGURE PASSWORD FILE ON AUXILIARY SERVER

$ cd $ORACLE_HOME/dbs

$ export ORACLE_SID=hrms

[oracle@SERVER2 dbs]$ orapwd file=orapwhrms password=oracle entries=3 force=y

Password must be same on Target database & Auxiliary database. When you connect RMAN to the

Source database as TARGET, must specify a password, even if RMAN uses OS authentication.



SET THE SAME PASSWORD OF CLONE DATABASE INTO THE TARGET DATABASE

SYS> alter user sys identified by oracle;

(or)

$ cd $ORACLE_HOME/dbs

$ export ORACLE_SID=crms

[oracle@SERVER2 dbs]$ orapwd file=orapwcrms password=oracle entries=3 force=y

To create a password in target server, we can use alter user statement or orapwd utlity.

STARTUP AUXILIARY DATABASE AT NOMOUNT STAGE & EXIT [oracle@SERVER2 ~]$ export ORACLE_SID=hrms

[oracle@SERVER2 ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 11.2.0.1.0 Production on Tue Jan 6 01:52:05 2015


Connected to an idle instance.

SQL> startup nomount;

ORACLE instance started.

Total System Global Area 1255473152 bytes

Fixed Size 1336232 bytes

Variable Size 822086744 bytes

Database Buffers 419430400 bytes

Redo Buffers 12619776 bytes

SQL> exit

Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

POINTS TO NOTE : Once I started my auxiliary instance in NOMOUNT state, i have disconnected SYS as ‘NO SESSION’

before duplicating a database. It is must and should.

DUPLICATING TARGET DATABASE In order to clone with the source database open and must be on archivelog mode. From 11g we can

clone databases using the “from active” database option. In this case we do NOT require an existing

backup, the active datafiles will be used as the source for the clone.

DUPLICATE TARGET DATABASE COMMAND PERFORMS THE FOLLOWING STEPS.

Creates an SPFILE.

Shuts down the instance and restarts it with the new spfile.

Restores the controlfile from the backup.

Mounts the database. Restore all datafiles.

RMAN creates all files in the converted names.

Recovers the datafiles up to the time specified and opens the database for availability.



CONNECT TO THE TARGET (SOURCE) & AUXILIARY (NEW CLONE) DATABASES USING RMAN

$ export ORACLE_SID=crms

$ rman target sys/oracle@CRMSDB auxiliary sys/orac1e@HRMSDB

Recovery Manager: Release 11.2.0.1.0 - Production on Tue Jan 6 01:52:55 2015

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

connected to target database: CRMS (DBID=1569424116)

connected to auxiliary database: HRMS (not mounted)

RMAN> duplicate target database to 'hrms' from active database;

Starting Duplicate Db at 06-JAN-15

using target database control file instead of recovery catalog

allocated channel: ORA_AUX_DISK_1

channel ORA_AUX_DISK_1: SID=19 device type=DISK

contents of Memory Script:

{

sql clone "create spfile from memory";

}

executing Memory Script

sql statement: create spfile from memory


{

shutdown clone immediate;

startup clone nomount;

}


Oracle instance shut down

connected to auxiliary database (not started)

Oracle instance started







{

sql clone "alter system set db_name =

''CRMS'' comment=

''Modified by RMAN duplicate'' scope=spfile";



sql clone "alter system set db_unique_name =

''HRMS'' comment=

''Modified by RMAN duplicate'' scope=spfile";


startup clone force nomount

backup as copy current controlfile auxiliary format

'/u01/app/oracle/oradata/hrms/control01.ctl' ;

restore clone controlfile to '/u01/app/oracle/flash_recovery_area/hrms/control02.ctl' from

'/u01/app/oracle/oradata/hrms/control01.ctl';

alter clone database mount;

}


sql statement: alter system set db_name = ''CRMS'' comment= ''Modified by RMAN duplicate''

scope=s pfile

sql statement: alter system set db_unique_name = ''HRMS'' comment= ''Modified by RMAN

duplicate'' scope=spfile








Starting backup at 06-JAN-15

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=33 device type=DISK

channel ORA_DISK_1: starting datafile copy

copying current control file

output file name=/u02/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_crms.f

tag=TAG20150106T013212 RE CID=6 STAMP=868239132

channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01

Finished backup at 06-JAN-15

Starting restore at 06-JAN-15

allocated channel: ORA_AUX_DISK_1

channel ORA_AUX_DISK_1: SID=18 device type=DISK

channel ORA_AUX_DISK_1: copied control file copy

Finished restore at 06-JAN-15

database mounted


{

set newname for datafile 1 to

"/u01/app/oracle/oradata/hrms//system01.dbf";




"/u01/app/oracle/oradata/hrms//sysaux01.dbf";


"/u01/app/oracle/oradata/hrms//undotbs01.dbf";


"/u01/app/oracle/oradata/hrms//users01.dbf";

backup as copy reuse

datafile 1 auxiliary format

"/u01/app/oracle/oradata/hrms//system01.dbf" datafile

2 auxiliary format

"/u01/app/oracle/oradata/hrms//sysaux01.dbf" datafile

3 auxiliary format

"/u01/app/oracle/oradata/hrms//undotbs01.dbf" datafile

4 auxiliary format

"/u01/app/oracle/oradata/hrms//users01.dbf" ;

sql 'alter system archive log current';

}


executing command: SET NEWNAME





using channel ORA_DISK_1


input datafile file number=00001 name=/u02/app/oracle/oradata/crms/system01.dbf

output file name=/u01/app/oracle/oradata/hrms/system01.dbf tag=TAG20150106T013219



input datafile file number=00002 name=/u02/app/oracle/oradata/crms/sysaux01.dbf

output file name=/u01/app/oracle/oradata/hrms/sysaux01.dbf tag=TAG20150106T013219



input datafile file number=00003 name=/u02/app/oracle/oradata/crms/undotbs01.dbf

output file name=/u01/app/oracle/oradata/hrms/undotbs01.dbf tag=TAG20150106T013219



input datafile file number=00004 name=/u02/app/oracle/oradata/crms/users01.dbf

output file name=/u01/app/oracle/oradata/hrms/users01.dbf tag=TAG20150106T013219



sql statement: alter system archive log current




{

backup as copy reuse

archivelog like

"/u02/app/oracle/flash_recovery_area/CRMS/archivelog/2015_01_06/o1_mf_1_14_bbovl f5y_.arc"

auxiliary format

"/u01/app/oracle/flash_recovery_area/HRMS/archivelog/2015_01_06/o1_mf_1_14_%u_.arc" ;

catalog clone recovery area;

switch clone datafile all;

}



using channel ORA_DISK_1

channel ORA_DISK_1: starting archived log copy

input archived log thread=1 sequence=14 RECID=13 STAMP=868239269

output file

name=/u01/app/oracle/flash_recovery_area/HRMS/archivelog/2015_01_06/o1_mf_1_14_1kps0ht6_ .arc

RECID=0 STAMP=0

channel ORA_DISK_1: archived log copy complete, elapsed time: 00:00:01


searching for all files in the recovery area

List of Files Unknown to the Database

=====================================

File Name:

/u01/app/oracle/flash_recovery_area/HRMS/archivelog/2015_01_06/o1_mf_1_14_1kps0ht6_.arc

cataloging files...

cataloging done

List of Cataloged Files

=======================

File Name:

/u01/app/oracle/flash_recovery_area/HRMS/archivelog/2015_01_06/o1_mf_1_14_1kps0ht6_.arc

datafile 1 switched to datafile copy

input datafile copy RECID=6 STAMP=868239272 file name=/u01/app/oracle/oradata/hrms/system01.dbf


input datafile copy RECID=7 STAMP=868239272 file name=/u01/app/oracle/oradata/hrms/sysaux01.dbf


input datafile copy RECID=8 STAMP=868239272 file name=/u01/app/oracle/oradata/hrms/undotbs01.dbf


input datafile copy RECID=9 STAMP=868239272 file name=/u01/app/oracle/oradata/hrms/users01.dbf


{

set until scn 1001716;



recover

clone database

delete archivelog

;

}


executing command: SET until clause

Starting recover at 06-JAN-15

using channel ORA_AUX_DISK_1

starting media recovery

archived log for thread 1 with sequence 14 is already on disk as file

/u01/app/oracle/flash_recovery _area/HRMS/archivelog/2015_01_06/o1_mf_1_14_1kps0ht6_.arc

archived log file

name=/u01/app/oracle/flash_recovery_area/HRMS/archivelog/2015_01_06/o1_mf_1_14_1kp s0ht6_.arc

thread=1 sequence=14

media recovery complete, elapsed time: 00:00:01

Finished recover at 06-JAN-15


{



sql clone "alter system set db_name =

''HRMS'' comment=

''Reset to original value by RMAN'' scope=spfile";

sql clone "alter system reset db_unique_name scope=spfile";



}


database dismounted









sql statement: alter system set db_name = ''HRMS'' comment= ''Reset to original value by

RMAN'' sc ope=spfile

sql statement: alter system reset db_unique_name scope=spfile











sql statement: CREATE CONTROLFILE REUSE SET DATABASE "HRMS" RESETLOGS ARCHIVELOG

MAXLOGFILES 16

MAXLOGMEMBERS 3

MAXDATAFILES 100

MAXINSTANCES 8

MAXLOGHISTORY 292

LOGFILE

GROUP 1 ( '/u01/app/oracle/oradata/hrms//redo01.log' ) SIZE 50 M REUSE,

GROUP 2 ( '/u01/app/oracle/oradata/hrms//redo02.log' ) SIZE 50 M REUSE,

GROUP 3 ( '/u01/app/oracle/oradata/hrms//redo03.log' ) SIZE 50 M REUSE

DATAFILE

'/u01/app/oracle/oradata/hrms/system01.dbf'

CHARACTER SET WE8MSWIN1252


{

set newname for tempfile 1 to

"/u01/app/oracle/oradata/hrms//temp01.dbf";

switch clone tempfile all;

catalog clone datafilecopy "/u01/app/oracle/oradata/hrms/sysaux01.dbf",

"/u01/app/oracle/oradata/hrms/undotbs01.dbf",

"/u01/app/oracle/oradata/hrms/users01.dbf";

switch clone datafile all;

}



renamed tempfile 1 to /u01/app/oracle/oradata/hrms//temp01.dbf in control file

cataloged datafile copy

datafile copy file name=/u01/app/oracle/oradata/hrms/sysaux01.dbf RECID=1 STAMP=868239296


datafile copy file name=/u01/app/oracle/oradata/hrms/undotbs01.dbf RECID=2 STAMP=868239296


datafile copy file name=/u01/app/oracle/oradata/hrms/users01.dbf RECID=3 STAMP=868239297


input datafile copy RECID=1 STAMP=868239296 file name=/u01/app/oracle/oradata/hrms/sysaux01.dbf




input datafile copy RECID=2 STAMP=868239296 file name=/u01/app/oracle/oradata/hrms/undotbs01.dbf


input datafile copy RECID=3 STAMP=868239297 file name=/u01/app/oracle/oradata/hrms/users01.dbf


{

Alter clone database open resetlogs;

}


database opened

Finished Duplicate Db at 06-JAN-15

ADD AN ENTRY IN /etc/oratab FILE

hrms:/u02/app/oracle/product/11.2.0/dbhome_1:Y

CONNECTING AUXILIARY DATABASE



DBID is different from the target database so it can be backed up independently and using the

same catalog as well.

SQL> select dbid from v$database;

DBID

----------

916592507

rman active database duplication server to server - directory structure is different (11g)...

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