TAF Unifying Oracle Database Services（oracletaf）

TAF, which stands for Transparent Application Failover, is an Oracle database feature that unifies all Oracle database services. It provides unified, data services such as availability, scalability, migrations and upgrades, regardless of the size of the database or the underlying database technology being used. By unifying all database services, TAF helps database administrators, application developers, and operational personnel to create and manage reliable, high-performance applications with minimal overhead.

TAF can be used to provide database service failover, scalability, and performance optimization. In the event of server failure, TAF can transparently switch the database services from one server to another, allowing the application to continue functioning without interruption. With TAF, database hosts can be provided with load balancing and failover capabilities by allowing the database services to be spread across multiple hosts, thus providing scalability and improved performance. Additionally, TAF offers seamless migration to new database versions, allowing database administrators to effortlessly upgrade the database services to the latest version while ensuring utmost reliability and fault tolerance.

To make use of TAF, Oracle database administrators need to configure a TAF client service on the database side, and a TAF server service at the application layer. A TAF client can be configured by adding the following code to the Oracle database side:

CREATE SERVICE “test_service”

USING ‘taf_test_pool’

NOTIFICATION (GV$ )

FAILOVER_METHOD = choose;

A TAF server should also be configured with the following code on the application layer:

CREATE SERVICE “test_service”

AUTHENTICATION = (OFF)

FAILOVER = (ON);

Finally, a TAF service must be linked to the database instance in order for the TAF service to be used. This is done by running the following command on the database side:

ALTER SYSTEM SET SERVICE NAME = ‘test_service’;

Once the TAF service is configured, users can leverage the TAF service to ensure maximum data availability and scalability, migration to new database versions and performance optimization. TAF ensures reliability, performance optimization, and dynamic scalability, and is used across all Oracle database platforms. With TAF, database administrators, application developers, and operational personnel can create and manage reliable, high-performance applications with minimal overhead.