Though we can the active duplication method, to clone a database from live running database. But sometime we may need to clone a database from a RMAN backup set. Below example will cover the steps for that.
STEPS: OEMDB (RAC201) to SAMDB (RAC202) Cloning
1. Take full rman backup from Source DB:-
If you already have any existing latest valid full backup, then you can use that instead of taking fresh backup.
RMAN> backup database plus archivelog;
Starting backup at 23-NOV-24
current log archived
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=77 device type=DISK
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=10 RECID=2 STAMP=1185809341
input archived log thread=1 sequence=11 RECID=1 STAMP=1185809325
input archived log thread=1 sequence=12 RECID=3 STAMP=1185809342
input archived log thread=1 sequence=13 RECID=4 STAMP=1185809345
input archived log thread=1 sequence=14 RECID=5 STAMP=1185809347
input archived log thread=1 sequence=15 RECID=6 STAMP=1185809459
input archived log thread=1 sequence=16 RECID=7 STAMP=1185809625
input archived log thread=1 sequence=17 RECID=8 STAMP=1185809887
input archived log thread=1 sequence=18 RECID=9 STAMP=1185809916
input archived log thread=1 sequence=19 RECID=10 STAMP=1185810951
channel ORA_DISK_1: starting piece 1 at 23-NOV-24
channel ORA_DISK_1: finished piece 1 at 23-NOV-24
piece handle=/data1/OEMDB_RMAN_BKP/0q3as2g8_26_1_1 tag=TAG20241123T155551 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 23-NOV-24
Starting backup at 23-NOV-24
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/data2/OEMDB/system01.dbf
input datafile file number=00003 name=/data2/OEMDB/sysaux01.dbf
input datafile file number=00004 name=/data2/OEMDB/undotbs01.dbf
input datafile file number=00007 name=/data2/OEMDB/users01.dbf
channel ORA_DISK_1: starting piece 1 at 23-NOV-24
channel ORA_DISK_1: finished piece 1 at 23-NOV-24
piece handle=/data1/OEMDB_RMAN_BKP/0r3as2g9_27_1_1 tag=TAG20241123T155553 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
Finished backup at 23-NOV-24
Starting backup at 23-NOV-24
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=20 RECID=11 STAMP=1185810960
channel ORA_DISK_1: starting piece 1 at 23-NOV-24
channel ORA_DISK_1: finished piece 1 at 23-NOV-24
piece handle=/data1/OEMDB_RMAN_BKP/0s3as2gh_28_1_1 tag=TAG20241123T155601 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 23-NOV-24
Starting Control File and SPFILE Autobackup at 23-NOV-24
piece handle=/data1/OEMDB_RMAN_BKP/c-853306698-20241123-04 comment=NONE
Finished Control File and SPFILE Autobackup at 23-NOV-24
RMAN> list backup;
List of Backup Sets
===================
BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
26 201.00M DISK 00:00:00 23-NOV-24
BP Key: 26 Status: AVAILABLE Compressed: NO Tag: TAG20241123T155551
Piece Name: /data1/OEMDB_RMAN_BKP/0q3as2g8_26_1_1
List of Archived Logs in backup set 26
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- --------- ---------- ---------
1 10 2138103 14-NOV-24 2177535 23-NOV-24
1 11 2177535 23-NOV-24 2177548 23-NOV-24
1 12 2177548 23-NOV-24 2177583 23-NOV-24
1 13 2177583 23-NOV-24 2178241 23-NOV-24
1 14 2178241 23-NOV-24 2178250 23-NOV-24
1 15 2178250 23-NOV-24 2178319 23-NOV-24
1 16 2178319 23-NOV-24 2178701 23-NOV-24
1 17 2178701 23-NOV-24 2179098 23-NOV-24
1 18 2179098 23-NOV-24 2179151 23-NOV-24
1 19 2179151 23-NOV-24 2180272 23-NOV-24
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
27 Full 1.52G DISK 00:00:05 23-NOV-24
BP Key: 27 Status: AVAILABLE Compressed: NO Tag: TAG20241123T155553
Piece Name: /data1/OEMDB_RMAN_BKP/0r3as2g9_27_1_1
List of Datafiles in backup set 27
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- --------- ----------- ------ ----
1 Full 2180290 23-NOV-24 NO /data2/OEMDB/system01.dbf
3 Full 2180290 23-NOV-24 NO /data2/OEMDB/sysaux01.dbf
4 Full 2180290 23-NOV-24 NO /data2/OEMDB/undotbs01.dbf
7 Full 2180290 23-NOV-24 NO /data2/OEMDB/users01.dbf
BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
28 4.00K DISK 00:00:00 23-NOV-24
BP Key: 28 Status: AVAILABLE Compressed: NO Tag: TAG20241123T155601
Piece Name: /data1/OEMDB_RMAN_BKP/0s3as2gh_28_1_1
List of Archived Logs in backup set 28
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- --------- ---------- ---------
1 20 2180272 23-NOV-24 2180299 23-NOV-24
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
29 Full 10.20M DISK 00:00:00 23-NOV-24
BP Key: 29 Status: AVAILABLE Compressed: NO Tag: TAG20241123T155602
Piece Name: /data1/OEMDB_RMAN_BKP/c-853306698-20241123-04
SPFILE Included: Modification time: 23-NOV-24
SPFILE db_unique_name: OEMDB
Control File Included: Ckp SCN: 2180315 Ckp time: 23-NOV-24
RMAN>
RMAN> crosscheck backup;
using channel ORA_DISK_1
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/data1/OEMDB_RMAN_BKP/0q3as2g8_26_1_1 RECID=26 STAMP=1185810952
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/data1/OEMDB_RMAN_BKP/0r3as2g9_27_1_1 RECID=27 STAMP=1185810953
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/data1/OEMDB_RMAN_BKP/0s3as2gh_28_1_1 RECID=28 STAMP=1185810961
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/data1/OEMDB_RMAN_BKP/c-853306698-20241123-04 RECID=29 STAMP=1185810962
Crosschecked 4 objects
2. Copy the backup pieces to the target host:If you are duplicating the database on a different host, then copy the backup pieces target host.
[oracle@rac201 OEMDB_RMAN_BKP]$ ls -lrt
total 1817748
-rw-r-----. 1 oracle oinstall 210763264 Nov 23 15:55 0q3as2g8_26_1_1
-rw-r-----. 1 oracle oinstall 1629282304 Nov 23 15:55 0r3as2g9_27_1_1
-rw-r-----. 1 oracle oinstall 4608 Nov 23 15:56 0s3as2gh_28_1_1
-rw-r-----. 1 oracle oinstall 10600448 Nov 23 15:56 snapcf_OEMDBP.f
-rw-r-----. 1 oracle oinstall 10715136 Nov 23 15:56 c-853306698-20241123-04
[oracle@rac201 OEMDB_RMAN_BKP ]$ scp * oracle@192.168.0.202:/data1/OEMDB_RMAN_BKPMount the /data1/OEMDB_RMAN_BKP - Mount point on rac202 sever (192.168.0.202)3. Prepare pfile for the new DB (SAMDB- RAC202):
[oracle@rac202 dbs]$ cat initSAMDB.ora
*._allow_insert_with_update_check=TRUE
*.audit_file_dest='/u01/app/oracle/oracle_base/admin/SAMDB/adump'
*.audit_trail='db'
*.compatible='19.0.0'
*.control_files='/data2/SAMDB/control01.ctl','/data2/SAMDB/control02.ctl'
*.db_block_size=8192
*.db_name='SAMDB'
*.diagnostic_dest='/u01/app/oracle/oracle_base'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=SAMDBXDB)'
*.log_archive_dest='/data2/SAMDB/arch'
*.nls_language='AMERICAN'
*.nls_territory='AMERICA'
*.open_cursors=300
*.pga_aggregate_target=770m
*.processes=300
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=2308m
*.undo_tablespace='UNDOTBS1'
*.db_file_name_convert='/data2/OEMDB','/data2/SAMDB'
*.log_file_name_convert='/data2/OEMDB','/data2/SAMDB'
4. Create required directory structure for SAMDB
mkdir -p /u01/app/oracle/oracle_base/admin/SAMDB/adump
mkdir -p /data2/SAMDB
mkdir -p /data2/SAMDB/arch
5. Start the database in (Nomount) stage - SAMDB:
[oracle@rac202 admin]$ cd SAMDB
[oracle@rac202 SAMDB]$ mkdir adump
[oracle@rac202 SAMDB]$
[oracle@rac202 SAMDB]$ sqlplus '/as sysdba'
SQL*Plus: Release 19.0.0.0.0 - Production on Sat Nov 23 16:51:14 2024
Version 19.21.0.0.0
Copyright (c) 1982, 2022, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 2432695120 bytes
Fixed Size 8928080 bytes
Variable Size 536870912 bytes
Database Buffers 1879048192 bytes
Redo Buffers 7847936 bytes
6. Run duplicate command by connecting auxiliary instance :-
[oracle@rac202 dbs]$ rman auxiliary /
SYNTAX – > DUPLICATE DATABASE TO <DB_NEW_NAME> BACKUP LOCATION ‘<<BACKUP_LOC>’ NOFILENAMECHECK;
[oracle@rac202 dbs]$ rman auxiliary /
Recovery Manager: Release 19.0.0.0.0 - Production on Sat Nov 23 17:17:33 2024
Version 19.21.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to auxiliary database: SAMDB (not mounted)
RMAN> DUPLICATE DATABASE TO SAMDB BACKUP LOCATION '/data1/OEMDB_RMAN_BKP/' NOFILENAMECHECK;
Starting Duplicate Db at 23-NOV-24
searching for database ID
found backup of database ID 853306698
contents of Memory Script:
{
sql clone "create spfile from memory";
}
executing Memory Script
sql statement: create spfile from memory
contents of Memory Script:
{
shutdown clone immediate;
startup clone nomount;
}
executing Memory Script
Oracle instance shut down
connected to auxiliary database (not started)
Oracle instance started
Total System Global Area 2432695120 bytes
Fixed Size 8928080 bytes
Variable Size 536870912 bytes
Database Buffers 1879048192 bytes
Redo Buffers 7847936 bytes
contents of Memory Script:
{
sql clone "alter system set db_name =
''OEMDB'' comment=
''Modified by RMAN duplicate'' scope=spfile";
sql clone "alter system set db_unique_name =
''SAMDB'' comment=
''Modified by RMAN duplicate'' scope=spfile";
shutdown clone immediate;
startup clone force nomount
restore clone primary controlfile from '/data1/OEMDB_RMAN_BKP/c-853306698-20241123-04';
alter clone database mount;
}
executing Memory Script
sql statement: alter system set db_name = ''OEMDB'' comment= ''Modified by RMAN duplicate'' scope=spfile
sql statement: alter system set db_unique_name = ''SAMDB'' comment= ''Modified by RMAN duplicate'' scope=spfile
Oracle instance shut down
Oracle instance started
Total System Global Area 2432695120 bytes
Fixed Size 8928080 bytes
Variable Size 536870912 bytes
Database Buffers 1879048192 bytes
Redo Buffers 7847936 bytes
Starting restore at 23-NOV-24
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=37 device type=DISK
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/data2/SAMDB/control01.ctl
output file name=/data2/SAMDB/control02.ctl
Finished restore at 23-NOV-24
database mounted
released channel: ORA_AUX_DISK_1
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=37 device type=DISK
contents of Memory Script:
{
set until scn 2180299;
set newname for datafile 1 to
"/data2/SAMDB/system01.dbf";
set newname for datafile 3 to
"/data2/SAMDB/sysaux01.dbf";
set newname for datafile 4 to
"/data2/SAMDB/undotbs01.dbf";
set newname for datafile 7 to
"/data2/SAMDB/users01.dbf";
restore
clone database
;
}
executing Memory Script
executing command: SET until clause
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting restore at 23-NOV-24
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_AUX_DISK_1: restoring datafile 00001 to /data2/SAMDB/system01.dbf
channel ORA_AUX_DISK_1: restoring datafile 00003 to /data2/SAMDB/sysaux01.dbf
channel ORA_AUX_DISK_1: restoring datafile 00004 to /data2/SAMDB/undotbs01.dbf
channel ORA_AUX_DISK_1: restoring datafile 00007 to /data2/SAMDB/users01.dbf
channel ORA_AUX_DISK_1: reading from backup piece /data1/OEMDB_RMAN_BKP/0r3as2g9_27_1_1
channel ORA_AUX_DISK_1: piece handle=/data1/OEMDB_RMAN_BKP/0r3as2g9_27_1_1 tag=TAG20241123T155553
channel ORA_AUX_DISK_1: restored backup piece 1
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:35
Finished restore at 23-NOV-24
contents of Memory Script:
{
switch clone datafile all;
}
executing Memory Script
datafile 1 switched to datafile copy
input datafile copy RECID=6 STAMP=1185816005 file name=/data2/SAMDB/system01.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=7 STAMP=1185816005 file name=/data2/SAMDB/sysaux01.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=8 STAMP=1185816005 file name=/data2/SAMDB/undotbs01.dbf
datafile 7 switched to datafile copy
input datafile copy RECID=9 STAMP=1185816005 file name=/data2/SAMDB/users01.dbf
contents of Memory Script:
{
set until scn 2180299;
recover
clone database
delete archivelog
;
}
executing Memory Script
executing command: SET until clause
Starting recover at 23-NOV-24
using channel ORA_AUX_DISK_1
starting media recovery
channel ORA_AUX_DISK_1: starting archived log restore to default destination
channel ORA_AUX_DISK_1: restoring archived log
archived log thread=1 sequence=20
channel ORA_AUX_DISK_1: reading from backup piece /data1/OEMDB_RMAN_BKP/0s3as2gh_28_1_1
channel ORA_AUX_DISK_1: piece handle=/data1/OEMDB_RMAN_BKP/0s3as2gh_28_1_1 tag=TAG20241123T155601
channel ORA_AUX_DISK_1: restored backup piece 1
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01
archived log file name=/data2/SAMDB/arch1_20_1185046732.dbf thread=1 sequence=20
channel clone_default: deleting archived log(s)
archived log file name=/data2/SAMDB/arch1_20_1185046732.dbf RECID=1 STAMP=1185816006
media recovery complete, elapsed time: 00:00:00
Finished recover at 23-NOV-24
Oracle instance started
Total System Global Area 2432695120 bytes
Fixed Size 8928080 bytes
Variable Size 536870912 bytes
Database Buffers 1879048192 bytes
Redo Buffers 7847936 bytes
contents of Memory Script:
{
sql clone "alter system set db_name =
''SAMDB'' comment=
''Reset to original value by RMAN'' scope=spfile";
sql clone "alter system reset db_unique_name scope=spfile";
}
executing Memory Script
sql statement: alter system set db_name = ''SAMDB'' comment= ''Reset to original value by RMAN'' scope=spfile
sql statement: alter system reset db_unique_name scope=spfile
Oracle instance started
Total System Global Area 2432695120 bytes
Fixed Size 8928080 bytes
Variable Size 536870912 bytes
Database Buffers 1879048192 bytes
Redo Buffers 7847936 bytes
sql statement: CREATE CONTROLFILE REUSE SET DATABASE "SAMDB" RESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 ( '/data2/SAMDB/redo01.log' ) SIZE 200 M REUSE,
GROUP 2 ( '/data2/SAMDB/redo02.log' ) SIZE 200 M REUSE,
GROUP 3 ( '/data2/SAMDB/redo03.log' ) SIZE 200 M REUSE
DATAFILE
'/data2/SAMDB/system01.dbf'
CHARACTER SET AL32UTF8
contents of Memory Script:
{
set newname for tempfile 1 to
"/data2/SAMDB/temp01.dbf";
switch clone tempfile all;
catalog clone datafilecopy "/data2/SAMDB/sysaux01.dbf",
"/data2/SAMDB/undotbs01.dbf",
"/data2/SAMDB/users01.dbf";
switch clone datafile all;
}
executing Memory Script
executing command: SET NEWNAME
renamed tempfile 1 to /data2/SAMDB/temp01.dbf in control file
cataloged datafile copy
datafile copy file name=/data2/SAMDB/sysaux01.dbf RECID=1 STAMP=1185816046
cataloged datafile copy
datafile copy file name=/data2/SAMDB/undotbs01.dbf RECID=2 STAMP=1185816046
cataloged datafile copy
datafile copy file name=/data2/SAMDB/users01.dbf RECID=3 STAMP=1185816046
datafile 3 switched to datafile copy
input datafile copy RECID=1 STAMP=1185816046 file name=/data2/SAMDB/sysaux01.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=2 STAMP=1185816046 file name=/data2/SAMDB/undotbs01.dbf
datafile 7 switched to datafile copy
input datafile copy RECID=3 STAMP=1185816046 file name=/data2/SAMDB/users01.dbf
contents of Memory Script:
{
Alter clone database open resetlogs;
}
executing Memory Script
database opened
Cannot remove created server parameter file
Finished Duplicate Db at 23-NOV-24
RMAN>
7. Check the status of the database :-
[oracle@rac202 dbs]$ sqlplus '/as sysdba'
SQL*Plus: Release 19.0.0.0.0 - Production on Sat Nov 23 18:08:09 2024
Version 19.21.0.0.0
Copyright (c) 1982, 2022, Oracle. All rights reserved.
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.21.0.0.0
SQL> select name,open_mode from v$database;
NAME OPEN_MODE
--------- -----------
SAMDB READ WRITE
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