What is Oracle Active Data Guard?
Active Data Guard is a comprehensive solution to eliminate single points of failure for mission critical Oracle Databases. It prevents data loss and downtime simply and economically by maintaining a synchronized physical replica (standby) of a production database (primary).
What are the different services available in Oracle Data Guard?
Redo Transport Services
Following are the different Services available in Oracle Data Guard of Oracle database: Redo Transport Services….Ans:
- High Availability.
- Data Protection.
- Off loading Backup operation to standby database.
- Automatic Gap detection and Resolution in standby database.
- Automatic Role Transition using Data Guard Broker.
What is the use of log_archive_dest_2?
LOG_ARCHIVE_DEST_n: this parameter is used to transfer the archived redo from the primary database to standby database. Standby to primary in case of switchover. Note: LOG_ARCHIVE_DEST_n destination must have either a LOCATION or SERVICE attribute to specify a local disk directory or a remotely accessed database.
How is Active Data Guard license?
Data Guard is a feature of the Oracle Database Enterprise Edition itself and does not require separate licensing. On the other hand, Active Data Guard is a so-called Oracle Database Enterprise Edition Option and as such requires separate licensing.
How does Active Data Guard work?
Data Guard automatically synchronizes the primary database and all standby databases by transmitting primary database redo – the information used by every Oracle Database to protect transactions – and applying it to the standby database.
How do I know if my Active Data Guard is enabled?
If you start a database in SQL*Plus using the STARTUP command and then invoke managed recovery, the Active Data Guard will be enabled.
How do I license Active Data Guard?
Active Data Guard Licensing must meet the following criteria:
- Both the primary and standby server(s) must be licensed.
- The licensing of Active Data Guard must match the number of licenses of the associated Oracle Database Enterprise Edition.
- A minimum of 25 Named User Plus per Processor licensing requirement must be met.
What are the Data Guard protection modes?
Oracle Data Guard provides three protection modes: maximum availability, maximum performance, and maximum protection.
What is Fal_server and Fal_client in Data Guard?
Answer: The fal_server and fal_client are init. ora parameters are used for the gap resolution. The fal_client specifies the FAL (fetch archive log) client name that is used by the FAL service, configured through the fal_server initialization parameter, to refer to the FAL client.
Which three actions can you perform on a DB system that has an Oracle Data Guard association with a standby database?
Performing planned maintenance on a DB system with an Oracle Data Guard association is typically done by switching the primary database to the standby role, performing maintenance on the standby database, and then switching it back to the primary role.
How do I enable Oracle Data Guard?
Create and enable Oracle Data Guard configurations,including setting up redo transport services and apply services
What is Data Guard Oracle?
Definition. Oracle Data Guard is an extension to the Oracle RDBMS that helps to establish and maintain secondary standby databases as alternatives to the production primary databases.
What is DataGuard in Oracle?
The software which Oracle Corporation markets as Oracle Data Guard forms an extension to the Oracle relational database management system ( RDBMS ). It aids in establishing and maintaining secondary standby databases as alternative/supplementary repositories to production primary databases.
What is active data guard?
Active Data Guard – Answers to Frequently Asked Questions. The Active Data Guard Option is an evolution of Data Guard technology that incorporates significant innovation (multiple patents pending) designed for a specific purpose – to improve production database performance for critical transactions.