3 Using Data Guard Broker and Enterprise Manager

3 Copyright © 2006, Oracle. All rights reserved. Using Data Guard Broker and Enterprise Manager Copyright © 2006, Oracle. All rights reserved. 3 - 2 Objectives After completing this lesson, you should be able to do the following: • Describe the Data Guard broker architecture • Describe the Data Guard broker components • Explain the benefits of the Data Guard broker • Explain Data Guard broker configurations • Use Enterprise Manager to manage your Data Guard configuration • Invoke DGMGRL to manage your Data Guard configuration Copyright © 2006, Oracle. All rights reserved. 3 - 3 Features of Data Guard Broker • The Data Guard broker is a distributed management framework. • The broker automates and centralizes the creation, maintenance, and monitoring of Data Guard configurations. • With the broker, you can perform all management operations locally or remotely through easy-to-use interfaces: – Oracle Enterprise Manager 10g Grid Control – A command-line interface: DGMGRL Copyright © 2006, Oracle. All rights reserved. 3 - 4 Data Guard Broker: Components • Client-side: – Oracle Enterprise Manager 10g Grid Control – DGMGRL (command-line interface) • Server-side: Data Guard monitor – DMON process – Configuration files Copyright © 2006, Oracle. All rights reserved. 3 - 5 Data Guard Broker: Configurations The most common configuration is a primary database at one location and a standby database at another location. Chicago Primary site Boston Standby site Oracle Net Copyright © 2006, Oracle. All rights reserved. 3 - 6 Data Guard Broker: Management Model Data Guard Broker Configuration Primary database Broker-controlled databases Standby database Standby database Standby database Standby database Standby database Standby database Standby database Standby database Standby database Instances Instances Copyright © 2006, Oracle. All rights reserved. 3 - 7 Primary site Standby site 9 Standby site 2 Data Guard Broker: Architecture Graphical user interface or command-line interface DMON Archived redo logs Online redo logs Standby site 1 Oracle Net Standby redo logs Archived redo logs Log apply services Data Guard Configuration Log transport services Primary database DMON Configuration files Configuration files Standby database Copyright © 2006, Oracle. All rights reserved. 3 - 8 Life Cycle of a Broker Configuration Create configuration Enable configuration Make state or role changes Update database properties Monitor and tune configuration Copyright © 2006, Oracle. All rights reserved. 3 - 9 Data Guard Broker: Requirements • Enterprise Edition of Oracle Database 10g • Single-instance or multi-instance environment • COMPATIBLE must be set to 9.2.0.1.0 or higher for primary and standby databases. • Oracle Net network files must be configured for databases that you add to the configuration. • LOCAL_LISTENER on each instance must resolve to an address that is reachable by all members. • GLOBAL_DBNAME attribute must be set to a concatenation of: db_unique_name_DGMGRL.db_domain Copyright © 2006, Oracle. All rights reserved. 3 - 10 Data Guard Broker: Requirements • DG_BROKER_START = TRUE • The primary database must be in ARCHIVELOG mode. • All databases must be in MOUNT or OPEN mode. • Configure DG_BROKER_CONFIG_FILEn for any RAC databases. • START_OPTIONS for any RAC databases must be set to MOUNT in the Oracle Cluster Repository (OCR). [...]... primary database and a standby database • Enables easy configuration of additional standby databases 3 - 15 Copyright © 2006, Oracle All rights reserved Benefits of Using the Data Guard Broker • Provides simplified, centralized, and extended management • Automates switchover and failover to a specified standby database in the broker configuration • Automatically communicates between the databases in a Data. . .Data Guard Broker and the SPFILE • You must use a server parameter file (SPFILE) for initialization parameters • Using the SPFILE enables the Data Guard broker to keep its configuration file and the database SPFILE consistent • If you use the broker, use Enterprise Manager or DGMGRL to update database parameter values 3 - 11 Copyright © 2006, Oracle All rights reserved Data Guard Monitor:... Failover • Data Guard Fast-Start Failover Observer • Data Guard Performance • Data Guard Status 3 - 22 Copyright © 2006, Oracle All rights reserved Managing Data Guard Metrics 1 2 3 4 3 - 23 Configure notification methods View the All Metrics page Set or change Data Guard metric thresholds View triggered metrics Copyright © 2006, Oracle All rights reserved Benefits of Using Enterprise Manager • Enables... Benefits of Using the Data Guard Broker • Enhances the high-availability, data protection, and disaster protection capabilities inherent in Oracle Data Guard by automating both configuration and monitoring tasks • Streamlines the process for any one of the standby databases to replace the primary database and take over production processing • Helps you logically define and create a Data Guard configuration... at the command prompt where the Oracle server is installed – Enables you to control and monitor a Data Guard configuration from the CLI prompt or in scripts 3 - 17 Copyright © 2006, Oracle All rights reserved Using Oracle Enterprise Manager 10g Grid Control Click “Setup and Manage” to access the Data Guard pages 3 - 19 Copyright © 2006, Oracle All rights reserved Data Guard Overview Page 3 - 20 Copyright... Databases: EDRSR8P1_ORCL - Primary database EDRSR8P1_SITE1 - Physical standby database EDRSR8P1_SITE2 - Logical standby database Current status for "EDRSR8P1_ORCL.oracle.com": SUCCESS 3 - 25 Copyright © 2006, Oracle All rights reserved Summary In this lesson, you should have learned how to: • Describe the Data Guard broker management model • Describe the Data Guard broker architecture • Describe Data. .. between the databases in a Data Guard configuration using Oracle Net Services • Provides built-in validation that monitors the health of all the databases in the configuration 3 - 16 Copyright © 2006, Oracle All rights reserved Data Guard Broker Interfaces • Oracle Enterprise Manager 10g Grid Control: – Contains wizards to simplify creating and managing standby databases • Command-line interface (CLI):... reserved Enterprise Manager Metrics and Alerts • Metrics: Units of measurement used to assess the health of your system • Thresholds: Boundary values against which monitored metric values are compared • Alert: Generated when a threshold is reached 3 - 21 Copyright © 2006, Oracle All rights reserved Using Data Guard Metrics Enterprise Manager includes the following Data Guard metrics: • Data Guard Fast-Start... each database instance in the configuration Created when you start the broker Performs requested functions and monitors the resource • Communicates with other DMON processes in the configuration • Updates the configuration file 3 - 13 Copyright © 2006, Oracle All rights reserved Data Guard Monitor: Configuration File • Automatically created and named using a default path name and file name when the broker. .. verify operation to ensure that redo transport services and log apply services are configured and functioning properly • Enables you to select a new primary database from a set of viable standby databases 3 - 24 Copyright © 2006, Oracle All rights reserved Using the Command-Line Interface of the Data Guard Broker DGMGRL> connect sys/oracle Connected DGMGRL> show configuration verbose Configuration . Primary database Broker- controlled databases Standby database Standby database Standby database Standby database Standby database Standby database Standby database. the Data Guard broker architecture • Describe the Data Guard broker components • Explain the benefits of the Data Guard broker • Explain Data Guard broker