Performing a Clone Using a Data Guard Snapshot Database
Performing a clone using a Data Guard Snapshot Database
This note describes the process of performing a database refresh of the reporting database using the Data Guard Standby database as the source for the clone and not the production primary database.
Environment:
- Primary Database :ttrl
- Standby Database : ttrl_dr (db_unique_name)
- Cloned Database: strl
Verify Data Guard Broker Configuration
DGMGRL> connect sys
Password:
Connected.
DGMGRL> show configuration
Configuration - ttrlDR
Protection Mode: MaxPerformance
Databases:
ttrl - Primary database
ttrl_dr - Physical standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS
Convert Physical Standby to Snapshot Standby
DGMGRL> convert database ttrl_dr to snapshot standby;
Converting database "ttrl_dr" to a Snapshot Standby database, please wait...
Database "ttrl_dr" converted successfully
DGMGRL> show configuration
Configuration - ttrlDR
Protection Mode: MaxPerformance
Databases:
ttrl - Primary database
ttrl_dr - Snapshot standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS
On Standby database, check the status of the database
oracle@test-devas:/export/home/oracle $ sqlplus sys as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Wed Jan 7 14:06:44 2015
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Enter password:
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select database_role from v$database;
DATABASE_ROLE
------
SNAPSHOT STANDBY
SQL> select open_mode from v$database;
OPEN_MODE
------
READ WRITE
Switch a few log files in the snapshot standby database otherwise we will get an error like the one shown below when we run the RMAN DUPLICATE
RMAN-03002: failure of Duplicate Db command at 05/16/2014 11:20:47
RMAN-05501: aborting duplication of target database
RMAN-05541: no archived logs found in target database
SQL> alter system switch logfile;
System altered.
SQL> /
System altered.
From Standby database verify connectivity to the clone database
oracle@test-devas:/export/home/oracle $ tnspingstrl
TNS Ping Utility for Solaris: Version 11.2.0.3.0 - Production on 07-JAN-2015 14:10:51
Copyright (c) 1997, 2011, Oracle. All rights reserved.
Used parameter files:
/u01/app/oracle/product/11.2.0/dbhome_3/network/admin/sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = devas)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = strl)))
OK (0 msec)
Drop the existing clone database
$ . oraenv
ORACLE_SID = [ttrl] ?strl
The Oracle base remains unchanged with value /u01/app/oracle
$ sqlplus sys as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Wed Jan 7 14:11:35 2015
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Enter password:
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount restrict;
ORACLE instance started.
Total System Global Area 2088402944 bytes
Fixed Size 2160896 bytes
Variable Size 1275070208 bytes
Database Buffers 805306368 bytes
Redo Buffers 5865472 bytes
Database mounted.
SQL> drop database;
Database dropped.
Prepare for clone
- Copy password file from production/standby and rename
- Copy init.ora from production/standby and rename
- Edit init.ora and make appropriate changes
- Remove all Data Guard related parameters
- Change parameters like db_name, control_file, db_file_name_convert, log_file_name_convert from ttrl to strl
- Create required directories on target server for clone database
- Add entries in listener.ora and tnsnames.ora for cloned database
- Set environment to cloned database – strl
Start the cloned instance in NOMOUNT state
$ . oraenv
ORACLE_SID = [ttrl] ?strl
The Oracle base remains unchanged with value /u01/app/oracle
$ sqlplus sys as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Wed Jan 7 14:26:11 2015
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Enter password:
Connected to an idle instance.
SQL> startupnomount;
ORACLE instance started.
Total System Global Area 2088402944 bytes
Fixed Size 2160896 bytes
Variable Size 1358956288 bytes
Database Buffers 721420288 bytes
Redo Buffers5865472 bytes
SQL>
From the Snapshot Standby environment, establish an RMAN auxiliary connection to the clone instance which is in nomount state at the moment
$ rman target sys/dbadmin1 auxiliary sys/dbadmin1@strl
Recovery Manager: Release 11.2.0.3.0 - Production on Wed Jan 7 14:30:09 2015
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: TTRL (DBID=3396213702)
connected to auxiliary database: STRL (not mounted)
Issue the DUPLICATE FROM ACTIVE DATABASE command
RMAN> duplicate target database to strl from active database nofilenamecheck;
Starting Duplicate Db at 07-JAN-15
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
....
While the clone process in in progress simulate some changes being made to the primary database
Note that since the standby database is currently running in snapshot standby mode, redo will be shipped from primary to the standby site, but will not be applied at this stage.
$ sqlplus system/dbadmin1
SQL*Plus: Release 11.2.0.3.0 Production on Wed Jan 7 14:33:11 2015
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> create table myobjects as select * from dba_objects;
Table created.
SQL> select count(*) from myobjects;
COUNT(*)
------
70365
SQL> insert into myobjects select * from dba_objects;
70365 rows created.
SQL> commit;
Commit complete.
SQL> select count(*) from myobjects;
COUNT(*)
------
140730
Note the output of the RMAN DUPLICATE DATABASE command
RMAN> duplicate target database to strl from active database nofilenamecheck;
Starting Duplicate Db at 07-JAN-15
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=114 device type=DISK
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 2088402944 bytes
Fixed Size2160896 bytes
Variable Size 1375733504 bytes
Database Buffers 704643072 bytes
Redo Buffers 5865472 bytes
contents of Memory Script:
{
sql clone "alter system setdb_name =
''TTRL'' comment=
''Modified by RMAN duplicate'' scope=spfile";
sql clone "alter system setdb_unique_name =
''STRL'' comment=
''Modified by RMAN duplicate'' scope=spfile";
shutdown clone immediate;
startup clone force nomount
backup as copy current controlfile auxiliary format '/u04/oradata/strl/control01.ctl';
restore clone controlfile to '/u05/oradata/strl/control02.ctl' from
'/u04/oradata/strl/control01.ctl';
restore clone controlfile to '/u05/oradata/strl/control03.ctl' from
'/u04/oradata/strl/control01.ctl';
alter clone database mount;
}
executing Memory Script
sql statement: alter system setdb_name = ''TTRL'' comment= ''Modified by RMAN duplicate'' scope=spfile
sql statement: alter system setdb_unique_name = ''STRL'' comment= ''Modified by RMAN duplicate'' scope=spfile
Oracle instance shut down
Oracle instance started
Total System Global Area 2088402944 bytes
Fixed Size 2160896 bytes
Variable Size 1375733504 bytes
Database Buffers704643072 bytes
Redo Buffers 5865472 bytes
Starting backup at 07-JAN-15
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=20 device type=DISK
channel ORA_DISK_1: starting datafile copy
copying current control file
output file name=/u01/app/oracle/product/11.2.0/dbhome_3/dbs/snapcf_ttrl.f tag=TAG20150107T143242 RECID=13 STAMP=868372362
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 07-JAN-15
Starting restore at 07-JAN-15
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=66 device type=DISK
channel ORA_AUX_DISK_1: copied control file copy
Finished restore at 07-JAN-15
Starting restore at 07-JAN-15
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: copied control file copy
Finished restore at 07-JAN-15
database mounted
contents of Memory Script:
{
sql clone 'alter database flashback off';
setnewname for datafile 1 to
"/u03/oradata/strl/system01.dbf";
setnewname for datafile 2 to
"/u03/oradata/strl/sysaux01.dbf";
setnewname for datafile 3 to
"/u03/oradata/strl/undotbs01.dbf";
setnewname for datafile 4 to
"/u03/oradata/strl/users01.dbf";
setnewname for datafile 5 to
"/u03/oradata/strl/tdl01.dbf";
setnewname for datafile 6 to
"/u03/oradata/strl/tdm01.dbf";
setnewname for datafile 7 to
"/u03/oradata/strl/tds01.dbf";
setnewname for datafile 8 to
"/u03/oradata/strl/til01.dbf";
setnewname for datafile 9 to
"/u03/oradata/strl/tis01.dbf";
setnewname for datafile 10 to
"/u03/oradata/strl/tim01.dbf";
backup as copy reuse
datafile 1 auxiliary format
"/u03/oradata/strl/system01.dbf"datafile
2 auxiliary format
"/u03/oradata/strl/sysaux01.dbf"datafile
3 auxiliary format
"/u03/oradata/strl/undotbs01.dbf"datafile
4 auxiliary format
"/u03/oradata/strl/users01.dbf"datafile
5 auxiliary format
"/u03/oradata/strl/tdl01.dbf"datafile
6 auxiliary format
"/u03/oradata/strl/tdm01.dbf"datafile
7 auxiliary format
"/u03/oradata/strl/tds01.dbf"datafile
8 auxiliary format
"/u03/oradata/strl/til01.dbf"datafile
9 auxiliary format
"/u03/oradata/strl/tis01.dbf"datafile
10 auxiliary format
"/u03/oradata/strl/tim01.dbf" ;
sql 'alter system archive log current';
}
executing Memory Script
sql statement: alter database flashback off
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting backup at 07-JAN-15
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00001 name=/u03/oradata/ttrl/system01.dbf
output file name=/u03/oradata/strl/system01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00002 name=/u03/oradata/ttrl/sysaux01.dbf
output file name=/u03/oradata/strl/sysaux01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00008 name=/u03/oradata/ttrl/til01.dbf
output file name=/u03/oradata/strl/til01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00005 name=/u03/oradata/ttrl/tdl01.dbf
output file name=/u03/oradata/strl/tdl01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00003 name=/u03/oradata/ttrl/undotbs01.dbf
output file name=/u03/oradata/strl/undotbs01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00006 name=/u03/oradata/ttrl/tdm01.dbf
output file name=/u03/oradata/strl/tdm01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00010 name=/u03/oradata/ttrl/tim01.dbf
output file name=/u03/oradata/strl/tim01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00007 name=/u03/oradata/ttrl/tds01.dbf
output file name=/u03/oradata/strl/tds01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00009 name=/u03/oradata/ttrl/tis01.dbf
output file name=/u03/oradata/strl/tis01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
channel ORA_DISK_1: starting datafile copy
inputdatafile file number=00004 name=/u03/oradata/ttrl/users01.dbf
output file name=/u03/oradata/strl/users01.dbf tag=TAG20150107T143253
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 07-JAN-15
sql statement: alter system archive log current
contents of Memory Script:
{
backup as copy reuse
archivelog like "/u02/oraback/ttrl/arch/ttrl_0868370727_0001_0000000005.arch" auxiliary format
"/u02/oraback/strl/arch/strl_0868370727_0001_0000000005.arch" ;
catalog clone archivelog "/u02/oraback/strl/arch/strl_0868370727_0001_0000000005.arch";
switch clone datafile all;
}
executing Memory Script
Starting backup at 07-JAN-15
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log copy
input archived log thread=1 sequence=5 RECID=1208 STAMP=868372462
output file name=/u02/oraback/strl/arch/strl_0868370727_0001_0000000005.arch RECID=0 STAMP=0
channel ORA_DISK_1: archived log copy complete, elapsed time: 00:00:01
Finished backup at 07-JAN-15
cataloged archived log
archived log file name=/u02/oraback/strl/arch/strl_0868370727_0001_0000000005.arch RECID=1208 STAMP=868372464
datafile 1 switched to datafile copy
inputdatafile copy RECID=13 STAMP=868372464 file name=/u03/oradata/strl/system01.dbf
datafile 2 switched to datafile copy
inputdatafile copy RECID=14 STAMP=868372464 file name=/u03/oradata/strl/sysaux01.dbf
datafile 3 switched to datafile copy
inputdatafile copy RECID=15 STAMP=868372464 file name=/u03/oradata/strl/undotbs01.dbf
datafile 4 switched to datafile copy
inputdatafile copy RECID=16 STAMP=868372464 file name=/u03/oradata/strl/users01.dbf
datafile 5 switched to datafile copy
inputdatafile copy RECID=17 STAMP=868372464 file name=/u03/oradata/strl/tdl01.dbf
datafile 6 switched to datafile copy
inputdatafile copy RECID=18 STAMP=868372464 file name=/u03/oradata/strl/tdm01.dbf
datafile 7 switched to datafile copy
inputdatafile copy RECID=19 STAMP=868372464 file name=/u03/oradata/strl/tds01.dbf
datafile 8 switched to datafile copy
inputdatafile copy RECID=20 STAMP=868372464 file name=/u03/oradata/strl/til01.dbf
datafile 9 switched to datafile copy
inputdatafile copy RECID=21 STAMP=868372464 file name=/u03/oradata/strl/tis01.dbf
datafile 10 switched to datafile copy
inputdatafile copy RECID=22 STAMP=868372464 file name=/u03/oradata/strl/tim01.dbf
contents of Memory Script:
{
set until scn 1296532233;
recover
clone database
deletearchivelog
;
}
executing Memory Script
executing command: SET until clause
Starting recover at 07-JAN-15
using channel ORA_AUX_DISK_1
starting media recovery
archived log for thread 1 with sequence 5 is already on disk as file /u02/oraback/strl/arch/strl_0868370727_0001_0000000005.arch
archived log file name=/u02/oraback/strl/arch/strl_0868370727_0001_0000000005.arch thread=1 sequence=5
media recovery complete, elapsed time: 00:00:01
Finished recover at 07-JAN-15
Oracle instance started
Total System Global Area 2088402944 bytes
Fixed Size 2160896 bytes
Variable Size 1375733504 bytes
Database Buffers 704643072 bytes
Redo Buffers 5865472 bytes
contents of Memory Script:
{
sql clone "alter system setdb_name =
''STRL'' comment=
''Reset to original value by RMAN'' scope=spfile";
sql clone "alter system resetdb_unique_name scope=spfile";
shutdown clone immediate;
startup clone nomount;
}
executing Memory Script
sql statement: alter system setdb_name = ''STRL'' comment= ''Reset to original value by RMAN'' scope=spfile
sql statement: alter system resetdb_unique_name scope=spfile
Oracle instance shut down
connected to auxiliary database (not started)
Oracle instance started
Total System Global Area 2088402944 bytes
Fixed Size 2160896 bytes
Variable Size 1375733504 bytes
Database Buffers 704643072 bytes
Redo Buffers 5865472 bytes
sql statement: CREATE CONTROLFILE REUSE SET DATABASE "STRL" RESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 5
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 1412
LOGFILE
GROUP 1 ( '/u04/oradata/strl/redo01a.log', '/u05/oradata/strl/redo01b.log' ) SIZE 150 M REUSE,
GROUP 2 ( '/u04/oradata/strl/redo02a.log', '/u05/oradata/strl/redo02b.log' ) SIZE 150 M REUSE,
GROUP 3 ( '/u04/oradata/strl/redo03a.log', '/u05/oradata/strl/redo03b.log' ) SIZE 150 M REUSE
DATAFILE
'/u03/oradata/strl/system01.dbf'
CHARACTER SET WE8MSWIN1252
contents of Memory Script:
{
setnewname for tempfile 1 to
"/u03/oradata/strl/temp01.dbf";
switch clone tempfile all;
catalog clone datafilecopy "/u03/oradata/strl/sysaux01.dbf",
"/u03/oradata/strl/undotbs01.dbf",
"/u03/oradata/strl/users01.dbf",
"/u03/oradata/strl/tdl01.dbf",
"/u03/oradata/strl/tdm01.dbf",
"/u03/oradata/strl/tds01.dbf",
"/u03/oradata/strl/til01.dbf",
"/u03/oradata/strl/tis01.dbf",
"/u03/oradata/strl/tim01.dbf";
switch clone datafile all;
}
executing Memory Script
executing command: SET NEWNAME
renamedtempfile 1 to /u03/oradata/strl/temp01.dbf in control file
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/sysaux01.dbf RECID=1 STAMP=868372488
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/undotbs01.dbf RECID=2 STAMP=868372488
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/users01.dbf RECID=3 STAMP=868372488
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/tdl01.dbf RECID=4 STAMP=868372488
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/tdm01.dbf RECID=5 STAMP=868372488
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/tds01.dbf RECID=6 STAMP=868372488
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/til01.dbf RECID=7 STAMP=868372488
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/tis01.dbf RECID=8 STAMP=868372488
catalogeddatafile copy
datafile copy file name=/u03/oradata/strl/tim01.dbf RECID=9 STAMP=868372488
datafile 2 switched to datafile copy
inputdatafile copy RECID=1 STAMP=868372488 file name=/u03/oradata/strl/sysaux01.dbf
datafile 3 switched to datafile copy
inputdatafile copy RECID=2 STAMP=868372488 file name=/u03/oradata/strl/undotbs01.dbf
datafile 4 switched to datafile copy
inputdatafile copy RECID=3 STAMP=868372488 file name=/u03/oradata/strl/users01.dbf
datafile 5 switched to datafile copy
inputdatafile copy RECID=4 STAMP=868372488 file name=/u03/oradata/strl/tdl01.dbf
datafile 6 switched to datafile copy
inputdatafile copy RECID=5 STAMP=868372488 file name=/u03/oradata/strl/tdm01.dbf
datafile 7 switched to datafile copy
inputdatafile copy RECID=6 STAMP=868372488 file name=/u03/oradata/strl/tds01.dbf
datafile 8 switched to datafile copy
inputdatafile copy RECID=7 STAMP=868372488 file name=/u03/oradata/strl/til01.dbf
datafile 9 switched to datafile copy
inputdatafile copy RECID=8 STAMP=868372488 file name=/u03/oradata/strl/tis01.dbf
datafile 10 switched to datafile copy
inputdatafile copy RECID=9 STAMP=868372488 file name=/u03/oradata/strl/tim01.dbf
Reenablingcontrolfile options for auxiliary database
Executing: alter database force logging
contents of Memory Script:
{
Alter clone database open resetlogs;
}
executing Memory Script
database opened
Executing: alter database flashback on
Finished Duplicate Db at 07-JAN-15
Convert the snapshot standby database back to original role of physical standby
DGMGRL> connect sys/dbadmin1
Connected.
DGMGRL> convert database ttrl_dr to physical standby;
Converting database "ttrl_dr" to a Physical Standby database, please wait...
Operation requires shutdown of instance "ttrl" on database "ttrl_dr"
Shutting down instance "ttrl"...
Database closed.
Database dismounted.
ORACLE instance shut down.
Operation requires startup of instance "ttrl" on database "ttrl_dr"
Starting instance "ttrl"...
ORACLE instance started.
Database mounted.
Continuing to convert database "ttrl_dr" ...
Operation requires shutdown of instance "ttrl" on database "ttrl_dr"
Shutting down instance "ttrl"...
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
Operation requires startup of instance "ttrl" on database "ttrl_dr"
Starting instance "ttrl"...
ORACLE instance started.
Database mounted.
Database "ttrl_dr" converted successfully
Confirm the role transition
DGMGRL> show configuration
Configuration - ttrlDR
Protection Mode: MaxPerformance
Databases:
ttrl - Primary database
ttrl_dr - Physical standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS
SQL> select database_role from v$database;
DATABASE_ROLE
------
PHYSICAL STANDBY
Open the Standby database and check if the changes made to the primary database while standby database was in snapshot standby mode have now been applied
SQL> select count(*) from system.myobjects;
select count(*) from system.myobjects
*
ERROR at line 1:
ORA-01219: database not open: queries allowed on fixed tables/views only
SQL> alter database open;
Database altered.
SQL> select count(*) from system.myobjects;
COUNT(*)
------
140730