How To: Configure Data Guard Broker

Configuring Data Guard Broker:
NOTE: You should have your physical standby already setup.
How to Setup Data Guard

1.) Check parameter DG_BROKER_START on primary:
SQL> show parameter DG_BROKER_START

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
dg_broker_start boolean FALSE

2.) Set DG_BROKER_START to true on primary:
SQL> alter system set DG_BROKER_START=true scope=both;

System altered.

3.)Check DG_BROKER_START on standby side:
SQL> show parameter DG_BROKER_START

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
dg_broker_start boolean FALSE

4.) Set DG_BROKER_START to true on standby:
SQL> alter system set DG_BROKER_START=true scope=both;

System altered.

5.) Define a service for the listener that includes the db_unique_name_DGMGRL.db_domain values for the GLOBAL_DBNAME:
Update the listener.ora file on primary and standby
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = orcl.abc.com)
(ORACLE_HOME = /opt/app/oracle/10.2)
(SID_NAME = orcl)
)
(SID_DESC =
(GLOBAL_DBNAME = orcl_DGMGRL.abc.com) -->_DGMGRL.
(ORACLE_HOME = /opt/app/oracle/10.2)
(SID_NAME = orcl)
)
)

6.) Now to create the data guard broker configurations:

[oracle@APP3 admin]$ dgmgrl
DGMGRL for Linux: Version 10.2.0.4.0 - 64bit Production

Copyright (c) 2000, 2005, Oracle. All rights reserved.

Welcome to DGMGRL, type "help" for information.
DGMGRL> connect sys/oracle
Connected.
DGMGRL> create configuration 'DBTEST'
> as primary database is 'orcl'
> connect identifier is orcl;
Configuration "DBTEST" created with primary database "orcl"
DGMGRL>

DGMGRL> show configuration

Configuration
Name: DBTEST
Enabled: NO
Protection Mode: MaxPerformance
Fast-Start Failover: DISABLED
Databases:
orcl - Primary database

Current status for "DBTEST":
DISABLED

DGMGRL>

7.) Now add standby DB to the data broker configuration:

DGMGRL> add database 'orcl1' as
> connect identifier is orcl1
> maintained as physical;
Database "orcl1" added
DGMGRL>
DGMGRL> show configuration

Configuration
Name: DBTEST
Enabled: NO
Protection Mode: MaxPerformance
Fast-Start Failover: DISABLED
Databases:
orcl - Primary database
orcl1 - Physical standby database

Current status for "DBTEST":
DISABLED

8.) Now enable the configurations:
DGMGRL> enable configuration
Enabled.
DGMGRL> show configuration

Configuration
Name: DBTEST
Enabled: YES
Protection Mode: MaxPerformance
Fast-Start Failover: DISABLED
Databases:
orcl - Primary database
orcl1 - Physical standby database

Current status for "DBTEST":
Warning: ORA-16607: one or more databases have failed


DGMGRL> show database verbose orcl1

Database
Name: orcl1
Role: PHYSICAL STANDBY
Enabled: YES
Intended State: ONLINE
Instance(s):
orcl

Properties:
InitialConnectIdentifier = 'orcl1'
ObserverConnectIdentifier = ''
LogXptMode = 'ARCH'
Dependency = ''
DelayMins = '0'
Binding = 'OPTIONAL'
MaxFailure = '0'
MaxConnections = '1'
ReopenSecs = '300'
NetTimeout = '180'
LogShipping = 'ON'
PreferredApplyInstance = ''
ApplyInstanceTimeout = '0'
ApplyParallel = 'AUTO'
StandbyFileManagement = 'MANUAL'
ArchiveLagTarget = '0'
LogArchiveMaxProcesses = '3'
LogArchiveMinSucceedDest = '1'
DbFileNameConvert = '/opt/app/oracle/oradata/orcl, /home/oracle/oradata/orcl'
LogFileNameConvert = '/opt/app/oracle/oradata/orcl, /home/oracle/oradata/orcl, /opt/app/oracle/flash_recovery_area/orcl/onlinelog, /home/oracle/oradata/flash_recovery_area/orcl'
FastStartFailoverTarget = ''
StatusReport = '(monitor)'
InconsistentProperties = '(monitor)'
InconsistentLogXptProps = '(monitor)'
SendQEntries = '(monitor)'
LogXptStatus = '(monitor)'
RecvQEntries = '(monitor)'
HostName = 'wrpws'
SidName = 'orcl'
LocalListenerAddress = '(ADDRESS=(PROTOCOL=tcp)(HOST=wrpws)(PORT=1521))'
StandbyArchiveLocation = '/home/oracle/oradata/orcl/archive'
AlternateLocation = ''
LogArchiveTrace = '0'
LogArchiveFormat = '%t_%s_%r.arc'
LatestLog = '(monitor)'
TopWaitEvents = '(monitor)'

Current status for "orcl1":
Error: ORA-12545: Connect failed because target host or object does not exist


DGMGRL>

Well the problem in my case was that the hostname was not getting resolved. I added the hostname to the host file and it started working.

After this error I got error:
Current status for "orcl1":
Error: ORA-16664: unable to receive the result from a remote database

Well same problem, communication between the 2 database. Make sure that the /etc/hosts files have entries of all other servers, with name and IP address.
Always review the log_archive_dest_2 parameter, to have the right entries and service is accessible.

DGMGRL> enable configuration
Enabled.
DGMGRL> show configuration

Configuration
Name: DBTEST
Enabled: YES
Protection Mode: MaxPerformance
Fast-Start Failover: DISABLED
Databases:
orcl - Primary database
orcl1 - Physical standby database

Current status for "DBTEST":
SUCCESS

DGMGRL>

This should setup Data Guard Broker.

COMMANDS Available in DGMGRL:

DGMGRL> help

The following commands are available:

add Add a standby database to the broker configuration
connect Connect to an Oracle instance
create Create a broker configuration
disable Disable a configuration, a database, or Fast-Start Failover
edit Edit a configuration, database, or instance
enable Enable a configuration, a database, or Fast-Start Failover
exit Exit the program
failover Change a standby database to be the primary database
help Display description and syntax for a command
quit Exit the program
reinstate Change a disabled database into a viable standby database
rem Comment to be ignored by DGMGRL
remove Remove a configuration, database, or instance
show Display information about a configuration, database, or instance
shutdown Shutdown a currently running Oracle instance
start Start Fast-Start Failover observer
startup Start an Oracle database instance
stop Stop Fast-Start Failover observer
switchover Switch roles between the primary database and a standby database

Use "help " to see syntax for individual commands