Managing the Data Guard broker configuration in Oracle 19c involves a comprehensive understanding of various processes and components. In this blog, we will discuss the steps required to set up and manage the Data Guard broker configuration effectively. We will cover the initial setup, configuration management, and the benefits of using the Data Guard broker.
The Oracle 19c Data Guard broker is a valuable tool for managing Data Guard configurations. It provides a centralized, unified interface to configure, monitor, and manage Oracle Data Guard setups. This blog will guide you through the process of managing a Data Guard broker configuration, ensuring your Oracle databases are highly available and resilient to disasters.
Data Guard Broker Management Overview
Understanding the Data Guard Broker
The Data Guard broker is a management framework that automates and centralizes the creation, maintenance, and monitoring of Data Guard configurations. It allows for the configuration and management of standby databases, ensuring high availability and data protection.
Key Components of Data Guard Broker
- DMON Process: The Data Guard Monitor (DMON) process is a background process that manages the configuration and monitoring of the Data Guard setup. It ensures each instance has a consistent copy of the configuration file.
- Configuration Files: These files store the properties and state of the Data Guard configuration. They are managed automatically by the DMON process.
- Management Interfaces: Oracle Enterprise Manager (OEM) and the Data Guard Command-Line Interface (DGMGRL) provide user interfaces for managing the Data Guard broker.
Setting Up Data Guard Broker Configuration
Initial Setup Requirements
Before configuring the Data Guard broker, ensure the following prerequisites are met:
- Oracle Database Enterprise Edition
- Single instance or RAC
- Archive log mode enabled on the primary database
- TCP/IP on Oracle NET Services
DG_BROKER_STARTparameter set to TRUE
Broker Management – Creating the Broker Configuration
Clear Redo Transport Network Locations on Primary:
ALTER SYSTEM SET log_archive_dest_2='' SCOPE=BOTH;
ALTER SYSTEM SET log_archive_dest_n='' SCOPE=BOTH;
Connect to the Primary Database using DGMGRL:
DGMGRL /
Define the Configuration and Primary Database Profile:
CREATE CONFIGURATION 'DRSolution' AS PRIMARY DATABASE IS 'boston' CONNECT IDENTIFIER IS boston;
Add Standby Databases to the Configuration:
ADD DATABASE 'london' AS CONNECT IDENTIFIER IS london;
Enable the Configuration:
ENABLE CONFIGURATION;
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Broker Management – Managing the Data Guard Configuration
Editing Configuration Properties
You can manage various properties of the Data Guard configuration through DGMGRL. For instance, to alter the state of the primary database:
EDIT DATABASE boston SET STATE='TRANSPORT-OFF';
To change a configurable property:
EDIT DATABASE boston SET PROPERTY LogXptMode='SYNC';
Upgrading the Data Guard Configuration
When upgrading or patching the Oracle database, follow these steps:
Disable Broker Management:
DGMGRL> DISABLE CONFIGURATION;
SQL> ALTER SYSTEM SET DG_BROKER_START=FALSE;
Perform the Upgrade
Re-enable the Broker Management:
SQL> ALTER SYSTEM SET DG_BROKER_START=TRUE;
DGMGRL> ENABLE CONFIGURATION;
Benefits of Data Guard Broker Management
Utilizing the Data Guard broker provides several benefits:
- Automated Management: Streamlines configuration and monitoring tasks, enhancing data protection and disaster recovery capabilities.
- Centralized Control: Provides a unified interface for managing the entire Data Guard environment.
- Enhanced Monitoring: Continuously monitors the health of the Data Guard configuration, ensuring high availability.
- Simplified Failover: Automates the failover process, allowing standby databases to seamlessly take over production roles.
Conclusion
Managing the Data Guard broker configuration in Oracle 19c is crucial for maintaining a robust and resilient database environment. By following the steps outlined in this guide, you can effectively configure and manage your Data Guard setup, ensuring high availability and data protection. The Data Guard broker simplifies the management process, making it an indispensable tool for Oracle DBAs.
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