rman cloning using recovery catalog

RMAN CLONING

Using Recovery Catalog

Rahmath Khan Patan

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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.

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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

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1.) Target DB2.) Recovery Catalog3.) Auxiliary DB with different port numbers.

[oracle@PC:09 admin] $ vi tnsnames.ora

RCDB =

(DESCRIPTION =

(ADDRESS_LIST =


)

(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 =


)

(CONNECT_DATA =

(SERVICE_NAME =AUXDB) )

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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>

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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.



PRODDB =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS_LIST =


) )

)

SID_LIST_PRODDB =

(SID_LIST =

(SID_DESC =


(SID_NAME = PRODDB) )

)

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Configure TNS entries for each of the databases given below

1.) Target DB2.) Recovery Catalog3.) Auxiliary Database

[oracle@PC:11 admin] $ vi tnsnames.ora

RCDB =

(DESCRIPTION =

(ADDRESS_LIST =


)

(CONNECT_DATA =


PRODDB =

(DESCRIPTION =

(ADDRESS_LIST =


(CONNECT_DATA =


AUXDB =

(DESCRIPTION =

(ADDRESS_LIST =


)

(CONNECT_DATA =


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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 DB2) Recovery Catalog DB3) 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.



AUXDB =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS_LIST =


) )

)

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SID_LIST_AUXDB =

(SID_LIST =

(SID_DESC =


(SID_NAME = AUXDB) )

)

ConfigureTNS Entries in tnsnames.ora file:

[oracle@PC:10 admin]$ vi tnsnames.ora

RCDB =

(DESCRIPTION =

(ADDRESS_LIST =


)

(CONNECT_DATA =


PRODDB =

(DESCRIPTION =

(ADDRESS_LIST =


(CONNECT_DATA =


AUXDB =

(DESCRIPTION =

(ADDRESS_LIST =


)

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(CONNECT_DATA =


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;

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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 [email protected]:/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 [email protected]:/$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:

1.) Change all the occurrences of ‘prodb’ to ‘auxdb’ by using below command in vi editor

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:%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

[oracle@PC:10 oradata]$ cd /u02

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[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


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>

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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


SQL> select instance_name from v$instance;

Instance Name

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

AUXDB

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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

connected to auxiliary database: AUXDB (not mounted)

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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";


"/u01/oracle/ora10g_home/product/oradata/auxdb/undotbs01.dbf";


"/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf";


"/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf";


"/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf";

restore

check readonly

clone database

;

}

executing Memory Script

executing command: SET until clause

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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 3

MAXDATAFILES 100

MAXINSTANCES 8

MAXLOGHISTORY 292

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LOGFILE

GROUP 1 ( '/u01/oracle/ora10g_home/product/oradata/auxdb/redo01.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


{

switch clone datafile all;

}


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


input datafile copy recid=2 stamp=780604638 filename=/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf


input datafile copy recid=3 stamp=780604638 filename=/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf


input datafile copy recid=4 stamp=780604639 filename=/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf


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{

set until scn 590638;

recover

clone database

delete archivelog

;

}


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)

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

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Finished recover at 14-APR-12


{

shutdown clone;

startup clone nomount ;

}


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

LOGFILE



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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


{

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;

}



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


datafile copy filename=/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf recid=2 stamp=780604665


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datafile copy filename=/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf recid=3 stamp=780604665


datafile copy filename=/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf recid=4 stamp=780604666


input datafile copy recid=1 stamp=780604665 filename=/u01/oracle/ora10g_home/product/oradata/auxdb/undotbs01.dbf


input datafile copy recid=2 stamp=780604665 filename=/u01/oracle/ora10g_home/product/oradata/auxdb/sysaux01.dbf


input datafile copy recid=3 stamp=780604665 filename=/u01/oracle/ora10g_home/product/oradata/auxdb/users01.dbf


input datafile copy recid=4 stamp=780604666 filename=/u01/oracle/ora10g_home/product/oradata/auxdb/example01.dbf


{

Alter clone database open resetlogs;

}


database opened

Finished Duplicate Db at 14-APR-12

rman cloning using recovery catalog

Documents

recovery catalog db

rcdb oracle

recovery catalog ownership

recovery catalog dbsql

rcdb proddb

rmanauxiliary db

abovetarget db

rman catalog rcuserrc123you