Oracle Tips by Burleson

Oracle 10g Data Guard Environment

Oracle Data Guard is one of the very popular options available to database administrators for setting up disaster recovery of a database or an alternate database for secondary uses. With the dual option of physical standby and logical standby databases, administrators have more choices in setting up near-real time synchronized secondary databases.

Oracle Database 10g goes further in enhancing the data guard database environment. In this section we will examine the new features that expand data guard capabilities and improve ease of use.

Overview of New Features

The improvements include the introduction of ‘real time apply’, enabling of redo encryption, integrity sum-checking and authentication, specifying role-based destinations, setting service provider's name, automatic and remote archiving, and better support for a RAC environment.

New features for Logical Standby include the simplified creation of a logical standby database with a logical standby control file, support for standby redo log files for logical standby databases, support for additional data types, IOT, and tables with unused columns, and an improved command set. There are also some new columns added to certain dba views to enhance diagnosis and trouble shooting capability.

In the case of the data guard broker, the configuration model has been simplified. Many commands in the DGMGRL have been improved. Data Guard Manager, which is a part of the enterprise manager, has a new interface and a new look. It extends support for Oracle RAC environments also.

We will examine these features next.

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