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

Protection Mode: MaxPerformance Databases: ttrl - Primary database ttrl_dr - Snapshot standby database

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

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 $ tnsping strl

TNS Ping Utility for Solaris: Version 11.2.0.3.0 - Production on 07-JAN-2015 14:10:51

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

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 o Remove all Data Guard related parameters o 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

Enter password: Connected to an idle instance.

SQL> startup nomount; ORACLE instance started.

Total System Global Area 2088402944 bytes Fixed Size 2160896 bytes Variable Size 1358956288 bytes Database Buffers 721420288 bytes Redo Buffers 5865472 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

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

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 Size 2160896 bytes Variable Size 1375733504 bytes Database Buffers 704643072 bytes Redo Buffers 5865472 bytes contents of Memory Script: { sql clone "alter system set db_name = ''TTRL'' comment= ''Modified by RMAN duplicate'' scope=spfile"; sql clone "alter system set db_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 set db_name = ''TTRL'' comment= ''Modified by RMAN duplicate'' scope=spfile sql statement: alter system set db_unique_name = ''STRL'' comment= ''Modified by RMAN duplicate'' scope=spfile

Oracle instance shut down

Oracle instance started

Fixed Size 2160896 bytes Variable Size 1375733504 bytes Database Buffers 704643072 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'; set newname for datafile 1 to "/u03/oradata/strl/system01.dbf"; set newname for datafile 2 to "/u03/oradata/strl/sysaux01.dbf"; set newname for datafile 3 to "/u03/oradata/strl/undotbs01.dbf"; set newname for datafile 4 to "/u03/oradata/strl/users01.dbf"; set newname for datafile 5 to "/u03/oradata/strl/tdl01.dbf"; set newname for datafile 6 to "/u03/oradata/strl/tdm01.dbf"; set newname for datafile 7 to "/u03/oradata/strl/tds01.dbf"; set newname for datafile 8 to "/u03/oradata/strl/til01.dbf"; set newname for datafile 9 to "/u03/oradata/strl/tis01.dbf"; set newname 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 input datafile 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 input datafile 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 input datafile 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 input datafile 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 input datafile 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 input datafile 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 input datafile 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 input datafile 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 input datafile 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 input datafile 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 input datafile copy RECID=13 STAMP=868372464 file name=/u03/oradata/strl/system01.dbf datafile 2 switched to datafile copy input datafile copy RECID=14 STAMP=868372464 file name=/u03/oradata/strl/sysaux01.dbf datafile 3 switched to datafile copy input datafile copy RECID=15 STAMP=868372464 file name=/u03/oradata/strl/undotbs01.dbf datafile 4 switched to datafile copy input datafile copy RECID=16 STAMP=868372464 file name=/u03/oradata/strl/users01.dbf datafile 5 switched to datafile copy input datafile copy RECID=17 STAMP=868372464 file name=/u03/oradata/strl/tdl01.dbf datafile 6 switched to datafile copy input datafile copy RECID=18 STAMP=868372464 file name=/u03/oradata/strl/tdm01.dbf datafile 7 switched to datafile copy input datafile copy RECID=19 STAMP=868372464 file name=/u03/oradata/strl/tds01.dbf datafile 8 switched to datafile copy input datafile copy RECID=20 STAMP=868372464 file name=/u03/oradata/strl/til01.dbf datafile 9 switched to datafile copy input datafile copy RECID=21 STAMP=868372464 file name=/u03/oradata/strl/tis01.dbf datafile 10 switched to datafile copy input datafile copy RECID=22 STAMP=868372464 file name=/u03/oradata/strl/tim01.dbf contents of Memory Script: { set until scn 1296532233; recover clone database delete archivelog ; } 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

Fixed Size 2160896 bytes Variable Size 1375733504 bytes Database Buffers 704643072 bytes Redo Buffers 5865472 bytes contents of Memory Script: { sql clone "alter system set db_name = ''STRL'' comment= ''Reset to original value by RMAN'' scope=spfile"; sql clone "alter system reset db_unique_name scope=spfile"; shutdown clone immediate; startup clone nomount; } executing Memory Script sql statement: alter system set db_name = ''STRL'' comment= ''Reset to original value by RMAN'' scope=spfile sql statement: alter system reset db_unique_name scope=spfile

Oracle instance shut down connected to auxiliary database (not started) Oracle instance started

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: { set newname 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 renamed tempfile 1 to /u03/oradata/strl/temp01.dbf in control file cataloged datafile copy datafile copy file name=/u03/oradata/strl/sysaux01.dbf RECID=1 STAMP=868372488 cataloged datafile copy datafile copy file name=/u03/oradata/strl/undotbs01.dbf RECID=2 STAMP=868372488 cataloged datafile copy datafile copy file name=/u03/oradata/strl/users01.dbf RECID=3 STAMP=868372488 cataloged datafile copy datafile copy file name=/u03/oradata/strl/tdl01.dbf RECID=4 STAMP=868372488 cataloged datafile copy datafile copy file name=/u03/oradata/strl/tdm01.dbf RECID=5 STAMP=868372488 cataloged datafile copy datafile copy file name=/u03/oradata/strl/tds01.dbf RECID=6 STAMP=868372488 cataloged datafile copy datafile copy file name=/u03/oradata/strl/til01.dbf RECID=7 STAMP=868372488 cataloged datafile copy datafile copy file name=/u03/oradata/strl/tis01.dbf RECID=8 STAMP=868372488 cataloged datafile copy datafile copy file name=/u03/oradata/strl/tim01.dbf RECID=9 STAMP=868372488 datafile 2 switched to datafile copy input datafile copy RECID=1 STAMP=868372488 file name=/u03/oradata/strl/sysaux01.dbf datafile 3 switched to datafile copy input datafile copy RECID=2 STAMP=868372488 file name=/u03/oradata/strl/undotbs01.dbf datafile 4 switched to datafile copy input datafile copy RECID=3 STAMP=868372488 file name=/u03/oradata/strl/users01.dbf datafile 5 switched to datafile copy input datafile copy RECID=4 STAMP=868372488 file name=/u03/oradata/strl/tdl01.dbf datafile 6 switched to datafile copy input datafile copy RECID=5 STAMP=868372488 file name=/u03/oradata/strl/tdm01.dbf datafile 7 switched to datafile copy input datafile copy RECID=6 STAMP=868372488 file name=/u03/oradata/strl/tds01.dbf datafile 8 switched to datafile copy input datafile copy RECID=7 STAMP=868372488 file name=/u03/oradata/strl/til01.dbf datafile 9 switched to datafile copy input datafile copy RECID=8 STAMP=868372488 file name=/u03/oradata/strl/tis01.dbf datafile 10 switched to datafile copy input datafile copy RECID=9 STAMP=868372488 file name=/u03/oradata/strl/tim01.dbf Reenabling controlfile 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

Protection Mode: MaxPerformance Databases: ttrl - Primary database ttrl_dr - Physical standby database

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