11gR2 RAC DataGuard setup using ASM

This document would describe the Dataguard setup for 11gR2 RAC database using ASM. We will be using same host for setting up Dataguard.

Environment Details

Database Version -
DB Host - oradbdev01,oradbdev02
Primary DB Unique Name - tintin
BCP DB Unique Name - snowy


oradbdev01[tintin1]:/home/oracle>srvctl status db -d tintin
Instance tintin1 is running on node oradbdev01
Instance tintin2 is running on node oradbdev02
oradbdev01[tintin1]:/home/oracle>srvctl status db -d snowy
Instance snowy2 is running on node oradbdev01
Instance snowy1 is running on node oradbdev02

Configuring Tnsnames.ora and Listener.ora

We will be using RMAN active database duplication commands to duplicate the database. So we need to setup static service registration by adding entries in listener.ora. Also we will use same setup for Dataguard Broker setup, so the service name will be snowy_DGMGRL and tintin_DGMGRL. There is one additional service per server i.e snowy_DGB and tintin_DGB. This will be used for Dataguard Broker setup. In case you don't plan to setup DG broker, you can ignore this.

Listener.ora entries for oradbdev01

    (SID_DESC =
          (GLOBAL_DBNAME = tintin_DGMGRL)
          (ORACLE_HOME = /home/oracle/product/11.2.0/dbhome_1)
          (SID_NAME = tintin1)
    (SID_DESC =
             (GLOBAL_DBNAME = snowy_DGMGRL)
             (ORACLE_HOME = /home/oracle/product/11.2.0/dbhome_1)
             (SID_NAME = snowy2)
             (GLOBAL_DBNAME = tintin_DGB)
             (ORACLE_HOME = /home/oracle/product/11.2.0/dbhome_1)
             (SID_NAME = tintin1)

Listener.ora entries for oradbdev02

    (SID_DESC =
          (GLOBAL_DBNAME = tintin_DGMGRL)
          (ORACLE_HOME = /home/oracle/product/11.2.0/dbhome_1)
          (SID_NAME = tintin2)
    (SID_DESC =
             (GLOBAL_DBNAME = snowy_DGMGRL)
             (ORACLE_HOME = /home/oracle/product/11.2.0/dbhome_1)
             (SID_NAME = snowy1)
             (GLOBAL_DBNAME = snowy_DGB)
             (ORACLE_HOME = /home/oracle/product/11.2.0/dbhome_1)
             (SID_NAME = snowy1)

Once done, restart the listener and scan listener

srvctl stop listener -n oradbdev01
srvctl start listener -n oradbdev01
srvctl stop listener -n oradbdev02
srvctl start listener -n oradbdev02
srvctl stop scan_listener
srvctl start scan_listener

Tnsnames.ora entries will remain same on both nodes. You can either maintain two separate files or use a shared location for files and give IFILE=<shared_location> in tnsnames.ora

tintin_dgmgrl =
    (ADDRESS = (PROTOCOL = TCP)(HOST = oradbdev01)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = oradbdev02)(PORT = 1521))

snowy_dgmgrl =
    (ADDRESS = (PROTOCOL = TCP)(HOST = oradbdev02)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = oradbdev01)(PORT = 1521))

Note that we have not used load_balance or failover in these entries. We will be having only one auxiliary instance started i.e snowy1 on oradbdev02.

Primary Database Configuration

Ensure that database is running in archivelog mode.First and important step before creating Oracle standby is to put database in force logging mode

SQL> alter database force logging;

You can confirm this by following query

SQL> select force_logging from V$DATABASE;


Next we need to set initialization parameters

alter system set LOG_ARCHIVE_CONFIG='DG_CONFIG=(tintin,snowy)' scope=both sid='*';
alter system set LOG_ARCHIVE_DEST_2='SERVICE=snowy_dgmgrl ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=snowy' scope=both sid='*';
alter system set FAL_SERVER=snowy_dgmgrl scope=both sid='*';
alter system set DB_FILE_NAME_CONVERT='+DATA/tintin','+DATA/snowy' scope=spfile sid='*';
alter system set LOG_FILE_NAME_CONVERT=+FLASH/tintin','+FLASH/snowy' scope=spfile sid='*';
alter system set STANDBY_FILE_MANAGEMENT=AUTO scope=both sid='*';

Since we are using ASM, we have set *FILE_NAME_CONVERT to '+DATA/tintin','+DATA/snowy'. When we run rman duplicate, rman will automatically create new database in +DATA/<db_unique_name>.

Add standby logfile

alter database add standby logfile thread 1 group 10 '+FLASH' size 200m;
alter database add standby logfile thread 1 group 11 '+FLASH' size 200m;
alter database add standby logfile thread 1 group 12 '+FLASH' size 200m;
alter database add standby logfile thread 2 group 13 '+FLASH' size 200m;
alter database add standby logfile thread 2 group 14 '+FLASH' size 200m;
alter database add standby logfile thread 2 group 15 '+FLASH' size 200m;

BCP Database Configuration

We will use snowy1 instance on oradbdev02 as auxiliary instance. We create parameter file initsnowy1.ora under $ORACLE_HOME/dbs with following parameters


We have kept cluster_database=false while using rman duplicate for standby command. Next step is to create password file for snowy database. Starting 11g, we need to copy the password file from primary (creating new password file for bcp with same password will not work). If you are using rman duplicate command, it will automatically copy password file for you

cp orapwtintin2 orapwsnowy1

Ensure that directory mentioned in audit_file_dest is created. Now we do a startup nomount for snowy1

Check DB connectivity

Check that you are able to connect to database using tnsnames.ora entries

sqlplus [email protected]_dgmgrl as sysdba
sqlplus [email protected]_dgmgrl as sysdba

If this is not done, then you will have to ensure static listener entries and tnsnames.ora entries are correct.Once this is done, proceed to next step

Standby database creation using RMAN

We will be using 11g new feature of duplicating database without rman backups. Connect to target and auxiliary instance as mentioned below

[[email protected]]~% rman

Recovery Manager: Release - Production on Wed Feb 15 08:28:33 2012

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

RMAN> connect target [email protected]_dgmgrl

connected to target database: TINTIN (DBID=2175947715)

RMAN> connect  auxiliary [email protected]_dgmgrl

connected to auxiliary database: TINTIN (not mounted)

You can create it from command line like below

rman target [email protected] auxiliary [email protected]_dgmgrl

Since I am using same host for Primary/BCP database, to have different instance_name snowy1/snowy2 we will not be using spfile option in rman

run {
allocate channel ch1 type disk;
allocate channel ch2 type disk;
allocate auxiliary channel ch3 type disk;
allocate auxiliary channel ch4 type disk;
duplicate target database for standby from active database DORECOVER;

In case you are using separate host for creating your standby database and instance_name will be same i.e tintin1/tintin2, then you can use following rman command. This would allow you to set the init.ora parameters in run block

run {
allocate channel ch1 type disk;
allocate channel ch2 type disk;
allocate auxiliary channel ch3 type disk;
allocate auxiliary channel ch4 type disk;
duplicate target database for standby from active database DORECOVER
parameter_value_convert 'tintin','snowy'
set 'db_unique_name'='snowy'
set sga_target="1500M"
set fal_server='tintin_dgmgrl'
set db_file_name_convert='+DATA/tintin','+DATA/snowy'
set log_archive_config='dg_config=(tintin,snowy)'
set log_file_name_convert='+FLASH/tintin','+FLASH/snowy'
set log_archive_dest_2='SERVICE=tintin_dgmgrl ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=tintin';

Above commands will duplicate the database to standby host and mount it. You can find the output of rman command here.

Starting Managed Recovery Process

Check that log shipping is working fine by running following query on primary database i.e tintin

set linesize 500
col DESTINATION for a30

Destination 2 should status as VALID. If there is any error, then fix it.
Next step is to start the MRP(Managed Recovery Process) on BCP database instance snowy1

alter database recover managed standby database  using current logfile parallel 8   disconnect

At this moment, we have only started instance snowy1 on oradbdev02. We need to start instance snowy2 also. Moreover the spfile created by rman duplicate is present in $ORACLE_HOME/dbs and we would like to move it to ASM. To do all this changes, we need to first stop Managed Recovery

alter database recover managed standby database cancel

Since BCP database was created with cluster_database=false, we need to make following changes

alter system set cluster_database=true scope=spfile sid='*';
 alter system set cluster_database_instances=2 scope=spfile sid='*';
 alter system set instance_number=2 scope=spfile sid='snowy2';
 alter system set  thread=2 scope=spfile sid='snowy2';
 alter system set undo_tablespace='UNDOTBS2' scope=spfile sid='snowy2';

Next we need to move spfile to ASM.We will first create a directory in ASM +DATA/SNOWY/PARAMETERFILE using asmcmd
Next is to copy file from $ORACLE_HOME/dbs to ASM using rman.

 restore spfile to '+DATA/SNOWY/PARAMETERFILE/spfilesnowy.ora';

Rename the $ORACLE_HOME/dbs/spfileinitsnowy1.ora and keep entry in initsnowy1.ora and initsnowy2.ora as below


Next we can add this database to OCR using

[[email protected]]~% srvctl add database -d snowy -o $ORACLE_HOME -p +DATA/SNOWY/PARAMETERFILE/spfilesnowy.ora
[[email protected]]~% srvctl add instance -d snowy -i snowy1 -n oradbdev02
[[email protected]]~% srvctl add instance -d snowy -i snowy2 -n oradbdev01

Now startup (mount) both instances and enable MRP on one node.

3 thoughts on “11gR2 RAC DataGuard setup using ASM

  1. First of all i’m very sorry to ask something out of your article..

    (OUR Production database size is 11 TB)VLDB, keep it in your mind.

    we have standby database up an running and every thing was good, but suddenly the storage that

    we store the data is failed with 7 disks and we lost all the data and stby configuration.

    we decide to start the configuration and creation for the stby from beginner,, and we used the version but When we executing the duplicate target DB command from active database in

    RMAN ,it hanging for looong time and gave us in the alert log of stby >> ( Destination database

    instance is ‘Started’ not ‘mounted’).

    please if u can help us reply me as soon as possible.

    big thanks for your time.

  2. Hello Nice post , please answer for few questions
    1. whether DR site need to install CRS software.
    2. Whether DR site required RAC / not.

    • Jeevan,

      You don’t need CRS/RAC on standby site but in case you plan to switchover and use standby site for serving traffic, then you will need to have RAC and similar capacity as primary


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