RMAN
CLONING
Using Recovery Catalog
Rahmath Khan Patan
The document has been prepared by taking into consideration the below mentioned details.
Target DB
Recovery Catalog
Auxiliary DB
Server I.P’s
192.168.0.11(PC:11)
192.168.0.9(PC:9)
192.168.0.10(PC:10)
DB Name
proddb
rcdb
auxdb
Listener &
TNS names
proddb
rcdb
auxdb
In this document, we have taken three servers as above
Target DB = Database which is to be cloned
Recovery Catalog = A database/repository of backup information of all the
databases registered with RMAN
Auxiliary DB = A cloned copy of the Target database.
Note: Recovery Catalog DB can be either be created on a separate system (as in real time) or
can be created in the target system itself.
2
Follow the below steps to clone a Production DB (proddb) to an Auxiliary DB (auxdb) using
a Recovery Catalog DB (rcdb).
Step-1:
First create a Recovery Catalog DB on 192.168.0.9 server using DBCA with DB_name and
SID as ‘rcdb’.
Using Netca or manually editing the listener.ora file, configure a Listener by name ‘rcdb’
[oracle@PC:09 ~] $ cd $ORACLE_HOME/network/admin
[oracle@PC:09 admin] $ vi listener.ora
RCDB =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.9)(PORT = 1521))
)
)
)
SID_LIST_RCDB =
(SID_LIST =
(SID_DESC =
(ORACLE_HOME =/u01/oracle/ora10g_home/)
(SID_NAME =RCDB) )
)
Now, using Netca or manually editing the tnsnames.ora file, configure 3 TNS entries, each for
3
1.) Target DB
2.) Recovery Catalog
3.) Auxiliary DB with different port numbers.
[oracle@PC:09 admin] $ vi tnsnames.ora
RCDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.9)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME =RCDB) ) )
PRODDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.11)(PORT = 1522)) )
(CONNECT_DATA =
(SERVICE_NAME =PRODDB) )
AUXDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.10)(PORT = 1523))
)
(CONNECT_DATA =
(SERVICE_NAME =AUXDB) )
4
Then, export the ORACLE_SID and login to sqlplus as sysdba
[oracle@PC:09 ~]$ export ORACLE_SID=rcdb
[oracle@PC:09 ~]$ sqlplus / as sysdba
SQL> startup
Check and confirm whether you are logged into the Recovery Catalog DB
SQL> select instance_name from v$instance;
SQL> select name from v$database;
Now, create a user for recovery catalog , create and assign a default tablespace and temporary
tablespace for that user.
First …. let’s create a default tablespace,
SQL> create tablespace rctbs datafile ‘/u01/oracle/oradata/rctbs01.dbf’ size 100m;
SQL> create user rcuser identified by rc123
default tablespace rctbs
temporary tablespace temp
quota unlimited on rctbs;
Grant the user with connect, resource and recovery catalog ownership privileges.
SQL> grant connect, resource, recovery_catalog_owner to rcuser;
SQL>exit
Now, connect to RMAN using with the new user created above.
[oracle@PC:09 ~] $ RMAN catalog rcuser/rc123
You will be seeing the RMAN prompt as soon as you hit enter after the above line.
RMAN>
5
Create a catalog to store all the backup information of all the databases in it.
RMAN> create catalog;
Catalog created
RMAN> exit
STEP-2:
Goto Target database server 192.168.0.11, (i.e proddb) and using Netca, configure a listener
for the prodbd database.
[oracle@PC:11 ~] $ cd $ORACLE_HOME/network/admin
[oracle@PC:11 admin] $ vi listener.ora
PRODDB =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.11)(PORT = 1522))
) )
)
SID_LIST_PRODDB =
(SID_LIST =
(SID_DESC =
(ORACLE_HOME =/u01/oracle/ora10g_home/)
(SID_NAME = PRODDB) )
)
6
Configure TNS entries for each of the databases given below
1.) Target DB
2.) Recovery Catalog
3.) Auxiliary Database
[oracle@PC:11 admin] $ vi tnsnames.ora
RCDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.9)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME =RCDB) ) )
PRODDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.11)(PORT = 1522)) )
(CONNECT_DATA =
(SERVICE_NAME =PRODDB) )
AUXDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.10)(PORT = 1523))
)
(CONNECT_DATA =
(SERVICE_NAME =AUXDB) )
7
Now, create a directory in another mount point say ‘/u02’ for storing the backup of the Target
Database taken through RMAN
[oracle@PC:11 ~]$ cd /u02
[oracle@PC:10 /u02] $ mkdir rmanbkp
Note: Create a similar directory on similar mount point in the Auxilary Database server
because RMAN uses a centralized location to access the backups of the databases.
STEP-3:
Goto the Auxiliary DB server 192.168.0.10 (i.e auxdb), create a listener and 3 TNS entries each
for the below mentioned databases same like you have created before.
1) Target DB
2) Recovery Catalog DB
3) Auxiliary DB
You can use Oracle’s Netca to configure listener and TNS names for the databases but in this
document, i have configured them by editing the listener.ora and tnsnames.ora files and making
the entries manually.
[oracle@PC:10 ~] $ cd $ORACLE_HOME/network/admin
[oracle@PC:10 admin] $ vi listener.ora
AUXDB =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.11)(PORT = 1523))
) )
)
8
SID_LIST_AUXDB =
(SID_LIST =
(SID_DESC =
(ORACLE_HOME =/u01/oracle/ora10g_home/)
(SID_NAME = AUXDB) )
)
ConfigureTNS Entries in tnsnames.ora file:
[oracle@PC:10 admin]$ vi tnsnames.ora
RCDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.9)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME =RCDB) ) )
PRODDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.11)(PORT = 1522)) )
(CONNECT_DATA =
(SERVICE_NAME =PRODDB) )
AUXDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.10)(PORT = 1523))
)
9
(CONNECT_DATA =
(SERVICE_NAME =AUXDB) )
Note: To make it easy for you, just copy the entries in any one of the tnsnames.ora file and
paste it into the tnsnames.ora file of other two databases. Then, you are done with
configuring the TNS names.
The purpose of configuring the LISTENER and TNSNAMES for each and every database is
to access the all the three databases from any of the servers using the concept of Networking
in ORACLE.
Do TNSPING <SID> to all the 3 databases to check the connection is working fine or not
STEP-4:
-The next step is to register the Target database with the RMAN for storing the backup
information of proddb in a central repository called Recovery Catalog.
-As we have configured listeners and tnsnames for all the three databases, we can connect to
RMAN from any of the three databases using RMAN commands.
-In this document i have chosen to connect to RMAN from the Target DB server.
-The below command connects to Target DB as SYS user and Recovery Catalog as ‘rcuser’
using a connecting string rcdb
[oracle@PC:11 ~] $ RMAN target / catalog rcuser/rc123@rcdb
RMAN>
-This command registers the Target Database with RMAN and hence forth any backup taken
on Target DB gets registered in the Recovery Catalog
RMAN> register database;
-Take backup of the Target database (proddb).
RMAN> backup format=’/u02/rmanbkp/prodfull_%t.bkp’ database plus archivelog;
10
RMAN> exit
Goto Auxiliary database server and create a directory ‘rmanbkp’ on ‘/u02’ mount point of the
Auxiliary database.
[oracle@PC:10 ~] $ cd /u02
[oracle@PC:10 u02] $ mkdir rmanbkp
Now…go back to Target database’s RMAN backup storage location i.e /u02/rmanbkp and copy
all the backup files to the directory created in previous step on Auxiliary Database.
[oracle@PC:11 rmanbkp] $ scp *.bkp oracle@192.168.0.10:/u02/rmanbkp/
All the backup files are copied to the rman backup location on Auxiliary database.
In the same way, goto $ORACLE_HOME/dbs location on Target database and copy and
rename the pfile of proddb (i.e initproddb.ora) to the similar location on Auxiliary database.
[PC:11 dbs]$ scp initproddb.ora oracle@192.168.0.10:/$ORACLE_HOME/dbs/initauxdb.ora
STEP-5:
After copying the pfile, goto the pfile location on Auxiliary database and edit it as below
[oracle@PC:10 dbs]$ vi initauxdb.ora
Edit and modify the following entries:
11
1.) Change all the occurrences of ‘prodb’ to ‘auxdb’ by using below command in vi editor
:%s/proddb/auxdb/g
2.) Change the ORACLE_HOME, ORADATA(for datafiles) and dump locations in the pfile
to the locations as per the locations in Auxiliary Database
3.) Add the below two lines at the end of the pfile
*.db_file_name_convert=(‘/u01/oradata/proddb’, ‘/u01/oradata/auxdb)
*.log_file_name_convert=(‘/u01/oradata/proddb’, ‘/u01/oradata/auxdb)
The above commands are used to convert the filename of a new datafile on the Target
database to a filename on the Auxiliary database
Note: If you have multiplexed copies of redolog files, then make one more entry of
‘log_file_name_convert’ with the multiplexed location of Target Database and Auxiliary
database.
For Ex: log_file_name_convert=(‘/u02/oradata/proddb’, ‘/u02/oradata/auxdb’)
4.) Changes the archives location to the new archives location of the Auxiliary database.
Now, create the directories in the Auxiliary database for datafiles, dump files and archives as
specified in the pfile.
[oracle@PC:10 ~]$ cd $ORACLE_HOME/admin
[oracle@PC:10 admin]$ mkdir auxdb
[oracle@PC:10 admin]$ cd auxdb
---- For dump folders
[oracle@PC:10 auxdb]$ mkdir adump bdump cdump udump
[oracle@PC:10 admin]$ cd /u01/oradata
[oracle@PC:10 oradata]$ mkdir auxdb
---- For datafiles
12
[oracle@PC:10 oradata]$ cd /u02
[oracle@PC:10 u02]$ mkdir archives
----- For Archive log files
As everything is in place now, we go ahead and login into sqlplus using SYS user and startup
the ‘auxdb’ database in nomount phase and then connect to RMAN for duplicating the Target
database to Auxiliary database using the RMAN backup stored in ‘/u02/rmanbkkp’ folder.
Before that,
[oracle@PC:10 ~]$ export ORACLE_SID=auxdb
[oracle@PC:10 ~]$ sqlplus / as sysdba
SQL> startpup nomount
SQL> exit
Exit from the sqlplus after the database is into nomount phase and then orapwd file for the
Auxiliary database
[oracle@PC:10 ~]$ cd $ORACLE_HOME/dbs
[oracle@PC:10 dbs]$ orapwd file=orapwauxdb password=aux123 entries=5
[oracle@PC:10 ~]$
Note: Here if you try connecting to RMAN might end up with a error saying
“rman: can’t open target”
Don’t get annoyed with it…this is due to $PATH variable not been set properly. Just follow
below steps and set the PATH variable for a smooth sailing into RMAN
[oracle@PC:10 ~]$ echo $PATH
What ever path displays on the screen, edit it and remove “/usr/X11R6/bin” and set the PATH
[oracle@PC:10 ~]$ export <PATH - /usr/X11R6/bin>
13
Now, connect to RMAN using all the 3 database’s Users and Connecting Strings…so that you
are connected to
1.) Target Database(proddb)
2.) Recovery Catalog (rcdb) and
3.) Auxiliary Database (auxdb – nomount phase)
[oracle@PC:10 ~]$ RMAN target sys/oracle@proddb catalog rcuser/rc123@rcdb auxiliary
sys/aux123@auxdb
Recovery Manager: Release 10.2.0.1.0 - Production on Sat Apr 14 18:29:27 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: ORCL (DBID=1308049214)
connected to recovery catalog database
connected to auxiliary database: AUXDB (not mounted)
RMAN> duplicate target database to auxdb;
Once the duplication is Finished, exit from RMAN
RMAN> exit
After finish, the database is opened with RESETLOGS option by RMAN.
Now, Login to sqlplus and check the instance name and database name
[oracle@PC:10 ~]$ sqlplus / as sysdba
SQL> select instance_name from v$instance;
Instance Name
-------------------AUXDB
14
SQL> select name from v$database;
Name
______
AUXDB
Finally, you have successfully cloned the proddb database on 192.168.0.11 server to the
auxdb database on 192.168.0.10 server using RMAN backup and Recovery Catalog.
====================== {@} Congratulations {@} ==========================
For Your Information:
Once you execute the DUPLICATE database command, RMAN will collect the backup files
from ‘/u02/rmanbkp’ location and start cloning the proddb database on to the auxdb database
with the file locations and parameters set in the pfile.
I’m posting here the complete transcript of the RMAN cloning execution displayed on the
screen after executing the DUPLICATE database command
[oracle@oracle dbs]$ rman target sys/oracle@orcl catalog rcuser/rc123@rcdb auxiliary
sys/aux123
Recovery Manager: Release 10.2.0.1.0 - Production on Sat Apr 14 18:29:27 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: ORCL (DBID=1308049214)
connected to recovery catalog database
15
connected to auxiliary database: AUXDB (not mounted)
RMAN> duplicate target database to auxdb;
Starting Duplicate Db at 14-APR-12
starting full resync of recovery catalog
full resync complete
using channel ORA_AUX_DISK_1
contents of Memory Script:
{
set until scn 590638;
set newname for datafile 1 to
"/u01/oracle/ora10g_home/product/oradata/auxdb/system01.dbf";
set newname for datafile 2 to
"/u01/oracle/ora10g_home/product/oradata/auxdb/undotbs01.dbf";
set newname for datafile 3 to
"/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf";
set newname for datafile 4 to
"/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf";
set newname for datafile 5 to
"/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf";
restore
check readonly
clone database
;
}
executing Memory Script
16
executing command: SET until clause
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting restore at 14-APR-12
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: starting datafile backupset restore
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/oracle/ora10g_home/product/oradata/auxdb/system01.dbf
restoring datafile 00002 to /u01/oracle/ora10g_home/product/oradata/auxdb/undotbs01.dbf
restoring datafile 00003 to /u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf
restoring datafile 00004 to /u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf
restoring datafile 00005 to /u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf
channel ORA_AUX_DISK_1: reading from backup piece /u02/rmanbkp/orclfull_780603436.bkp
channel ORA_AUX_DISK_1: restored backup piece 1
piece handle=/u02/rmanbkp/orclfull_780603436.bkp tag=TAG20120414T181716
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:01:26
Finished restore at 14-APR-12
sql statement: CREATE CONTROLFILE REUSE SET DATABASE "AUXDB" RESETLOGS ARCHIVELOG
MAXLOGFILES
16
MAXLOGMEMBERS
MAXDATAFILES
100
MAXINSTANCES
8
3
17
MAXLOGHISTORY
292
LOGFILE
GROUP 1 ( '/u01/oracle/ora10g_home/product/oradata/auxdb/redo01.log' ) SIZE 50 M REUSE,
GROUP 2 ( '/u01/oracle/ora10g_home/product/oradata/auxdb/redo02.log' ) SIZE 50 M REUSE,
GROUP 3 ( '/u01/oracle/ora10g_home/product/oradata/auxdb/redo03.log' ) SIZE 50 M REUSE
DATAFILE
'/u01/oracle/ora10g_home/product/oradata/auxdb/system01.dbf'
CHARACTER SET AL32UTF8
contents of Memory Script:
{
switch clone datafile all;
}
executing Memory Script
released channel: ORA_AUX_DISK_1
datafile 2 switched to datafile copy
input datafile copy recid=1 stamp=780604638
filename=/u01/oracle/ora10g_home/product/oradata/auxdb/undotbs01.dbf
datafile 3 switched to datafile copy
input datafile copy recid=2 stamp=780604638
filename=/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf
datafile 4 switched to datafile copy
input datafile copy recid=3 stamp=780604638
filename=/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf
datafile 5 switched to datafile copy
input datafile copy recid=4 stamp=780604639
filename=/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf
18
contents of Memory Script:
{
set until scn 590638;
recover
clone database
delete archivelog
;
}
executing Memory Script
executing command: SET until clause
Starting recover at 14-APR-12
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: sid=159 devtype=DISK
starting media recovery
channel ORA_AUX_DISK_1: starting archive log restore to default destination
channel ORA_AUX_DISK_1: restoring archive log
archive log thread=1 sequence=15
channel ORA_AUX_DISK_1: reading from backup piece /u02/rmanbkp/orclfull_780603484.bkp
channel ORA_AUX_DISK_1: restored backup piece 1
piece handle=/u02/rmanbkp/orclfull_780603484.bkp tag=TAG20120414T181804
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01
archive log
filename=/u01/oracle/ora10g_home/product/flash_recovery_area/AUXDB/archivelog/2012_04_14/o1_mf_1_15
_7rlxnfv3_.arc thread=1 sequence=15
channel clone_default: deleting archive log(s)
19
archive log
filename=/u01/oracle/ora10g_home/product/flash_recovery_area/AUXDB/archivelog/2012_04_14/o1_mf_1_15
_7rlxnfv3_.arc recid=1 stamp=780604645
media recovery complete, elapsed time: 00:00:04
Finished recover at 14-APR-12
contents of Memory Script:
{
shutdown clone;
startup clone nomount ;
}
executing Memory Script
database dismounted
Oracle instance shut down
connected to auxiliary database (not started)
Oracle instance started
Total System Global Area
285212672 bytes
Fixed Size
1218992 bytes
Variable Size
104859216 bytes
Database Buffers
176160768 bytes
Redo Buffers
2973696 bytes
sql statement: CREATE CONTROLFILE REUSE SET DATABASE "AUXDB" RESETLOGS ARCHIVELOG
MAXLOGFILES
16
MAXLOGMEMBERS
3
MAXDATAFILES
100
MAXINSTANCES
8
MAXLOGHISTORY
292
20
LOGFILE
GROUP 1 ( '/u01/oracle/ora10g_home/product/oradata/auxdb/redo01.log' ) SIZE 50 M REUSE,
GROUP 2 ( '/u01/oracle/ora10g_home/product/oradata/auxdb/redo02.log' ) SIZE 50 M REUSE,
GROUP 3 ( '/u01/oracle/ora10g_home/product/oradata/auxdb/redo03.log' ) SIZE 50 M REUSE
DATAFILE
'/u01/oracle/ora10g_home/product/oradata/auxdb/system01.dbf'
CHARACTER SET AL32UTF8
contents of Memory Script:
{
set newname for tempfile 1 to
"/u01/oracle/ora10g_home/product/oradata/auxdb/temp01.dbf";
switch clone tempfile all;
catalog clone datafilecopy "/u01/oracle/ora10g_home/product/oradata/auxdb/undotbs01.dbf";
catalog clone datafilecopy "/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf";
catalog clone datafilecopy "/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf";
catalog clone datafilecopy "/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf";
switch clone datafile all;
}
executing Memory Script
executing command: SET NEWNAME
renamed temporary file 1 to /u01/oracle/ora10g_home/product/oradata/auxdb/temp01.dbf in control file
cataloged datafile copy
datafile copy filename=/u01/oracle/ora10g_home/product/oradata/auxdb/undotbs01.dbf recid=1
stamp=780604665
cataloged datafile copy
21
datafile copy filename=/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf recid=2
stamp=780604665
cataloged datafile copy
datafile copy filename=/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf recid=3
stamp=780604665
cataloged datafile copy
datafile copy filename=/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf recid=4
stamp=780604666
datafile 2 switched to datafile copy
input datafile copy recid=1 stamp=780604665
filename=/u01/oracle/ora10g_home/product/oradata/auxdb/undotbs01.dbf
datafile 3 switched to datafile copy
input datafile copy recid=2 stamp=780604665
filename=/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf
datafile 4 switched to datafile copy
input datafile copy recid=3 stamp=780604665
filename=/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf
datafile 5 switched to datafile copy
input datafile copy recid=4 stamp=780604666
filename=/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf
contents of Memory Script:
{
Alter clone database open resetlogs;
}
executing Memory Script
database opened
Finished Duplicate Db at 14-APR-12
22