DG broker的配置和使用

发布时间：2020-08-08 06:18:03 来源：ITPUB博客阅读：246 作者：wg0411 栏目：关系型数据库

配置方法
1、主备都在静态监听里新增DG broker的配置
主库为
(SID_DESC=
(GLOBAL_DBNAME=PROD_DGMGRL)
(ORACLE_HOME=/db/oracle/product/11.2.0/db_1/)
(SID_NAME=PROD)
)

备库为
(SID_DESC=
(GLOBAL_DBNAME=PROD_STD_DGMGRL)
(ORACLE_HOME=/mnt/sdb1/u01/app/oracle/product/11.2.0.4/db)
(SID_NAME=PROD_STD)
)

2、主备都设置参数
SQL> alter system set dg_broker_start=true;

使用方法
主备都可以执行
dgmgrl
DGMGRL> connect sys/123456
DGMGRL> connect sys/123456@tnsname
DGMGRL> help

DGMGRL> help show
Displays information about a configuration, database, or instance
Syntax:
SHOW CONFIGURATION [VERBOSE];
SHOW DATABASE [VERBOSE] <database name> [<property name>];
SHOW INSTANCE [VERBOSE] <instance name> [<property name>]
[ON DATABASE <database name>];
SHOW FAST_START FAILOVER;

DGMGRL> help create
Creates a broker configuration
Syntax:
CREATE CONFIGURATION <configuration name> AS
PRIMARY DATABASE IS <database name>
CONNECT IDENTIFIER IS <connect identifier>;

DGMGRL> help add
Adds a standby database to the broker configuration
Syntax:
ADD DATABASE <database name>
[AS CONNECT IDENTIFIER IS <connect identifier>]
[MAINTAINED AS {PHYSICAL|LOGICAL}];

DGMGRL> help switchover
Switches roles between a primary and standby database
Syntax:
SWITCHOVER TO <standby database name>;

以上database name其实为db_unique_name,connect identifier表示tnsname

DGMGRL> SHOW CONFIGURATION;
ORA-16532: Data Guard broker configuration does not exist
Configuration details cannot be determined by DGMGRL

DGMGRL> CREATE CONFIGURATION DG1 AS PRIMARY DATABASE IS PROD2 CONNECT IDENTIFIER IS PROD2;
Configuration "dg1" created with primary database "prod2"

DGMGRL> ADD DATABASE PROD2_STD AS CONNECT IDENTIFIER IS PROD2_STD MAINTAINED AS PHYSICAL;
Database "prod2_std" added

DGMGRL> SHOW CONFIGURATION;
Configuration - dg1
Protection Mode: MaxPerformance
Databases:
prod2 - Primary database
prod2_std - Physical standby database
Fast-Start Failover: DISABLED
Configuration Status:
DISABLED

DGMGRL> enable CONFIGURATION;
Enabled.
一旦enable configuration，那么主库的log_archive_dest_2就有值了

DGMGRL> show CONFIGURATION VERBOSE;
Configuration - dg1
Protection Mode: MaxPerformance
Databases:
prod2 - Primary database
prod2_std - Physical standby database
Properties:
FastStartFailoverThreshold = '30'
OperationTimeout = '30'
FastStartFailoverLagLimit = '30'
CommunicationTimeout = '180'
ObserverReconnect = '0'
FastStartFailoverAutoReinstate = 'TRUE'
FastStartFailoverPmyShutdown = 'TRUE'
BystandersFollowRoleChange = 'ALL'
ObserverOverride = 'FALSE'
ExternalDestination1 = ''
ExternalDestination2 = ''
PrimaryLostWriteAction = 'CONTINUE'
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS

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DG broker的配置和使用

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