This illustration shows a Data Guard configuration consisting of a primary site and two standby sites. At the top of the figure, there are several terminals displayed to represent the clients and applications, and the user interfaces for managing the Data Guard environment. The user interfaces shown include the Data Guard command-line interface and the Oracle Data Guard Manager graphical user interface.

On the primary site, the following main components are shown: the primary database, Oracle Data Guard broker, the online redo logs, and the archived redo logs. This figure also shows the online redo logs archiving through an Oracle Net connection to each standby site.

Each standby site contains the following main components: a standby database, Oracle Data Guard broker, and the archived redo logs.

The components in a Data Guard configuration are described in more detail in the text following the illustration.