The following text describes odg_arch.gif.

This figure shows a broker configuration consisting of a primary database and a standby database. At the top of the figure, there is a terminal displayed to represent the user interfaces for managing the Data Guard environment: the Data Guard command-line interface and the Data Guard GUI.

On the primary database, this figure shows the log transport services in addition to the following main components: the primary database, Oracle Data Guard monitor (DMON), the online redo log files, and the archived redo log files. The figure also shows standby redo log files on the primary side in preparation for a switchover to the standby role.

The standby database includes the following components: a standby database, the log apply services, Oracle Data Guard monitor, archived redo log files, and standby redo log files. The figure also shows the online redo log files being archived to the standby databases and the Data Guard monitor processes communicating with each other over Oracle Net.