Oracle Data Guard is the most effective solution available today to protect the core asset of any enterprise—its data, and make it available on a 24x7 basis even in the face of disasters and other calamities. This guide describes Oracle Data Guard technology and concepts, and helps you configure and implement standby databases.
Oracle Data Guard Concepts and Administration is intended for database administrators (DBAs) who administer the backup, restoration, and recovery operations of an Oracle database system.
To use this document, you should be familiar with relational database concepts and basic backup and recovery administration. You should also be familiar with the operating system environment under which you are running Oracle software.
Our goal is to make Oracle products, services, and supporting documentation accessible, with good usability, to the disabled community. To that end, our documentation includes features that make information available to users of assistive technology. This documentation is available in HTML format, and contains markup to facilitate access by the disabled community. Accessibility standards will continue to evolve over time, and Oracle is actively engaged with other market-leading technology vendors to address technical obstacles so that our documentation can be accessible to all of our customers. For more information, visit the Oracle Accessibility Program Web site at
Screen readers may not always correctly read the code examples in this document. The conventions for writing code require that closing braces should appear on an otherwise empty line; however, some screen readers may not always read a line of text that consists solely of a bracket or brace.
This documentation may contain links to Web sites of other companies or organizations that Oracle does not own or control. Oracle neither evaluates nor makes any representations regarding the accessibility of these Web sites.
Oracle provides dedicated Text Telephone (TTY) access to Oracle Support Services within the United States of America 24 hours a day, seven days a week. For TTY support, call 800.446.2398.
Readers of Oracle Data Guard Concepts and Administration should also read:
The beginning of Oracle Database Concepts, that provides an overview of the concepts and terminology related to the Oracle database and serves as a foundation for the more detailed information in this guide.
The chapters in the Oracle Database Administrator's Guide that deal with managing the control files, online redo log files, and archived redo log files.
The chapter in the Oracle Database Utilities that discusses LogMiner technology.
Oracle Data Guard Broker that describes the graphical user interface and command-line interface for automating and centralizing the creation, maintenance, and monitoring of Data Guard configurations.
Oracle Enterprise Manager online Help system
Discussions in this book also refer you to the following guides:
Also, see Oracle Streams Concepts and Administration for information about Oracle Streams and the Streams Downstream Capture Database. The Streams downstream capture process uses the Oracle Data Guard redo transport services to transfer redo data to log files on a remote database where a Streams capture process captures changes in the archived redo log files at the remote destination.
The following text conventions are used in this document:
|boldface||Boldface type indicates graphical user interface elements associated with an action, or terms defined in text or the glossary.|
|italic||Italic type indicates book titles, emphasis, or placeholder variables for which you supply particular values.|
||Monospace type indicates commands within a paragraph, URLs, code in examples, text that appears on the screen, or text that you enter.|