Some customer want to know if we can create a new standby from an existing ADG standby, because we can reduce the overhead workload on primary when creating new standby by using this way.

SOLUTION

Existing primary database: adgpri

Existing standby database: adgstby

The new standby database to be created: adgnew.

All this primary and standby are running on the same host.

Step 1. Create standby controlfile on primary:

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

[[email protected] ~]$ export ORACLE_SID=adgpri
[[email protected] ~]$ sqlplus / as sysdba

SQL> alter database create standby controlfile as '/home/oracle/app/oracle/oradata/adgnew/control01.ctl';

[[email protected] ~]$ export ORACLE_SID=adgnew

Step 2. Configure static listener and tnsnames point to the new standby:

------------------------------------------------------------------------------------
$ cat $ORACLE_HOME/network/admin/listener.ora
# listener.ora Network Configuration File: /home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = adg.fsm.com)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(UR=A)
)
)

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_1)
(PROGRAM = extproc)
)

(SID_DESC =
(GLOBAL_DBNAME = adgstby)
(ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = adgstby)
)
(SID_DESC =
(GLOBAL_DBNAME = adgnew)
(ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = adgnew)
)

)
ADR_BASE_LISTENER = /home/oracle/app/oracle

[[email protected] ~]$ lsnrctl stop

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 10-AUG-2017 12:27:11

Copyright (c) 1991, 2013, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=adg.fsm.com)(PORT=1521))(UR=A))
The command completed successfully
[[email protected] ~]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 10-AUG-2017 12:27:16

Copyright (c) 1991, 2013, Oracle. All rights reserved.

Starting /home/oracle/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.4.0 - Production
System parameter file is /home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Log messages written to /home/oracle/app/oracle/diag/tnslsnr/adg/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=adg.fsm.com)(PORT=1521))(UR=A))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))(UR=A))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=adg.fsm.com)(PORT=1521))(UR=A))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 10-AUG-2017 12:27:16
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File /home/oracle/app/oracle/diag/tnslsnr/adg/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=adg.fsm.com)(PORT=1521))(UR=A))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))(UR=A))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "adgnew" has 1 instance(s).
Instance "adgnew", status UNKNOWN, has 1 handler(s) for this service...
Service "adgstby" has 1 instance(s).
Instance "adgstby", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[[email protected] ~]$ vi $ORACLE_HOME/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File: /home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ADGSTBY =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.210.98)(PORT = 1521))
)
(SERVICE_NAME = adgstby)
)
)

ADGPRI =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.210.98)(PORT = 1521))
)
(SERVICE_NAME = adgpri)
)
)

ADGNEW =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.210.98)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = adgnew)
)
)
~
"app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora" 32L, 715C written
[[email protected] ~]$ tnsping adgnew

TNS Ping Utility for Linux: Version 11.2.0.4.0 - Production on 10-AUG-2017 12:28:33

Copyright (c) 1997, 2013, Oracle. All rights reserved.

Used parameter files:
/home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/sqlnet.ora

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.210.98)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = adgnew)))
OK (20 msec)

Step 3. Create password file for the new standby

------------------------------------------------------
[[email protected] ~]$ cd $ORACLE_HOME/dbs
[[email protected] dbs]$ cp orapwadgpri orapwadgnew

Step 4. Create pfile for the new standby

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

( Please be aware of db_file_name_convert, should be the location mapping between two standby database)

[[email protected] ~]$ vi pfilestby.txt

*.audit_file_dest='/home/oracle/app/oracle/admin/adgnew/adump'
*.audit_trail='db'
*.compatible='11.2.0.4.0'
*.control_files='/home/oracle/app/oracle/oradata/adgnew/control01.ctl'
*.db_block_size=8192
*.db_domain=''
*.db_file_name_convert='/home/oracle/app/oracle/oradata/adgstby','/home/oracle/app/oracle/oradata/adgnew'
*.db_name='adgpri'
*.db_unique_name='adgnew'
*.diagnostic_dest='/home/oracle/app/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=adgnewXDB)'
*.fal_client='ADGPRI'
*.fal_server='ADGSTBY'
*.log_archive_config='DG_CONFIG=(adgpri,adgnew)'
*.log_archive_dest_2='SERVICE=adgpri LGWR SYNC VALID_FOR=(ONLINE_LOGFILES,primary_ROLE) DB_UNIQUE_NAME=adgpri'
*.log_archive_dest_state_1='ENABLE'
*.log_archive_dest_state_2='ENABLE'
*.log_file_name_convert='/home/oracle/app/oracle/oradata/adgpri','/home/oracle/app/oracle/oradata/adgnew'
*.open_cursors=300
*.pga_aggregate_target=456130560
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=1368391680
*.standby_file_management='AUTO'
*.undo_tablespace='UNDOTBS1'

Step 5. Create spfile for new standby, and start up new standby to nomount status:

------------------------------------------------------
[[email protected] ~]$ export ORACLE_SID=adgnew
[[email protected] ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Thu Aug 10 12:35:33 2017

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> shutdown abort
ORACLE instance shut down.
SQL> create spfile from pfile='/home/oracle/pfilestby.txt';

File created.

[[email protected] ~]$ export ORACLE_SID=adgnew
[[email protected] ~]$ sqlplus / as sysdba

SQL> startup nomount
ORACLE instance started.

Total System Global Area 1369579520 bytes
Fixed Size 2253104 bytes
Variable Size 419434192 bytes
Database Buffers 939524096 bytes
Redo Buffers 8368128 bytes

Step 6. Duplicate new standby(adgnew) from the existing standby(adgstby):

---------------------------------------------------------------------------------------
[[email protected] ~]$ export ORACLE_SID=adgstby
[[email protected] ~]$ rman target / auxiliary sys/[email protected]

Recovery Manager: Release 11.2.0.4.0 - Production on Thu Aug 10 12:37:38 2017

Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.

connected to target database: ADGPRI (DBID=1362425892)
connected to auxiliary database: ADGPRI (not mounted)

RMAN> duplicate target database for standby from active database nofilenamecheck dorecover;

Starting Duplicate Db at 10-AUG-17
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=19 device type=DISK

contents of Memory Script:
{
backup as copy reuse
targetfile '/home/oracle/app/oracle/product/11.2.0/dbhome_1/dbs/orapwadgstby' auxiliary format
'/home/oracle/app/oracle/product/11.2.0/dbhome_1/dbs/orapwadgnew' ;
}
executing Memory Script

Starting backup at 10-AUG-17
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1 device type=DISK
Finished backup at 10-AUG-17

contents of Memory Script:
{
backup as copy current controlfile for standby auxiliary format '/home/oracle/app/oracle/oradata/adgnew/control01.ctl';
}
executing Memory Script

Starting backup at 10-AUG-17
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
copying standby control file
output file name=/home/oracle/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_adgstby.f tag=TAG20170810T123746 RECID=7 STAMP=951655066
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
Finished backup at 10-AUG-17

contents of Memory Script:
{
sql clone 'alter database mount standby database';
}
executing Memory Script

sql statement: alter database mount standby database

contents of Memory Script:
{
set newname for tempfile 1 to
"/home/oracle/app/oracle/oradata/adgnew/temp01.dbf";
switch clone tempfile all;
set newname for datafile 1 to
"/home/oracle/app/oracle/oradata/adgnew/system01.dbf";
set newname for datafile 2 to
"/home/oracle/app/oracle/oradata/adgnew/sysaux01.dbf";
set newname for datafile 3 to
"/home/oracle/app/oracle/oradata/adgnew/undotbs01.dbf";
set newname for datafile 4 to
"/home/oracle/app/oracle/oradata/adgnew/users01.dbf";
backup as copy reuse
datafile 1 auxiliary format
"/home/oracle/app/oracle/oradata/adgnew/system01.dbf" datafile
2 auxiliary format
"/home/oracle/app/oracle/oradata/adgnew/sysaux01.dbf" datafile
3 auxiliary format
"/home/oracle/app/oracle/oradata/adgnew/undotbs01.dbf" datafile
4 auxiliary format
"/home/oracle/app/oracle/oradata/adgnew/users01.dbf" ;
}
executing Memory Script

executing command: SET NEWNAME

renamed tempfile 1 to /home/oracle/app/oracle/oradata/adgnew/temp01.dbf in control file

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

Starting backup at 10-AUG-17
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00001 name=/home/oracle/app/oracle/oradata/adgstby/system01.dbf
output file name=/home/oracle/app/oracle/oradata/adgnew/system01.dbf tag=TAG20170810T123757
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:45
channel ORA_DISK_1: starting datafile copy
input datafile file number=00002 name=/home/oracle/app/oracle/oradata/adgstby/sysaux01.dbf
output file name=/home/oracle/app/oracle/oradata/adgnew/sysaux01.dbf tag=TAG20170810T123757
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:35
channel ORA_DISK_1: starting datafile copy
input datafile file number=00003 name=/home/oracle/app/oracle/oradata/adgstby/undotbs01.dbf
output file name=/home/oracle/app/oracle/oradata/adgnew/undotbs01.dbf tag=TAG20170810T123757
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
input datafile file number=00004 name=/home/oracle/app/oracle/oradata/adgstby/users01.dbf
output file name=/home/oracle/app/oracle/oradata/adgnew/users01.dbf tag=TAG20170810T123757
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 10-AUG-17

contents of Memory Script:
{
switch clone datafile all;
}
executing Memory Script

datafile 1 switched to datafile copy
input datafile copy RECID=7 STAMP=951655166 file name=/home/oracle/app/oracle/oradata/adgnew/system01.dbf
datafile 2 switched to datafile copy
input datafile copy RECID=8 STAMP=951655166 file name=/home/oracle/app/oracle/oradata/adgnew/sysaux01.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=9 STAMP=951655166 file name=/home/oracle/app/oracle/oradata/adgnew/undotbs01.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=10 STAMP=951655166 file name=/home/oracle/app/oracle/oradata/adgnew/users01.dbf

contents of Memory Script:
{
set until scn 1015629;
recover
standby
clone database
noredo
delete archivelog
;
}
executing Memory Script

executing command: SET until clause

Starting recover at 10-AUG-17
using channel ORA_AUX_DISK_1

Finished recover at 10-AUG-17
Finished Duplicate Db at 10-AUG-17

Step 7. Configure new parameters related to the new standby for primary:

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

[[email protected] ~]$ export ORACLE_SID=adgpri
[[email protected] ~]$ sqlplus / as sysdba

SQL> select open_mode,database_role from v$database;

OPEN_MODE DATABASE_ROLE
-------------------- ----------------
READ WRITE PRIMARY

SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_3='SERVICE=adgnew NOAFFIRM ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=adgnew';

System altered.

SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_3=ENABLE;

System altered.

SQL> ALTER SYSTEM SET LOG_ARCHIVE_CONFIG='DG_CONFIG=(adgpri,adgstby,adgnew)';

System altered.

SQL> show parameter log_archive_dest

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest string
log_archive_dest_1 string
log_archive_dest_10 string
log_archive_dest_11 string
log_archive_dest_12 string
log_archive_dest_13 string
log_archive_dest_14 string
log_archive_dest_15 string
log_archive_dest_16 string
log_archive_dest_17 string
log_archive_dest_18 string

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_19 string
log_archive_dest_2 string SERVICE=adgstby LGWR SYNC VALI
D_FOR=(ONLINE_LOGFILES,primary
_ROLE) DB_UNIQUE_NAME=adgstby
log_archive_dest_20 string
log_archive_dest_21 string
log_archive_dest_22 string
log_archive_dest_23 string
log_archive_dest_24 string
log_archive_dest_25 string
log_archive_dest_26 string

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_27 string
log_archive_dest_28 string
log_archive_dest_29 string
log_archive_dest_3 string SERVICE=adgnew NOAFFIRM ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRI
MARY_ROLE) DB_UNIQUE_NAME=adgn
ew
log_archive_dest_30 string
log_archive_dest_31 string
log_archive_dest_4 string
log_archive_dest_5 string

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_6 string
log_archive_dest_7 string
log_archive_dest_8 string
log_archive_dest_9 string

Step 8. Start up the new standby, and start real time redo apply:

-------------------------------------------------------------------------
[[email protected] ~]$ export ORACLE_SID=adgnew
[[email protected] ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Thu Aug 10 12:44:44 2017

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> shutdown immediate

ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
SQL> SQL> startup
ORACLE instance started.

Total System Global Area 1369579520 bytes
Fixed Size 2253104 bytes
Variable Size 419434192 bytes
Database Buffers 939524096 bytes
Redo Buffers 8368128 bytes
Database mounted.
Database opened.
SQL> alter database recover managed standby database using current logfile disconnect from session;