Database Reference
In-Depth Information
Figure 9-1.
Overview of the main processes used in Data Guard with a single standby in sync with production using
Real-Time-Apply and asynchronous redo transmission
One of the RFS processes writes the redo stream into standby redo logs. The managed recovery process (MRP0)
on the standby database applies the new information as soon as it arrives. Once filled, the standby redo log is archived
by one of the standby database's archiver processes.
Before continuing the discussion let's review the various types of standby databases.
Types of standby databases
You can choose from the following five types of standby databases:
•
Physical standby database
•
Snapshot standby database
•
Logical standby database
•
Transient logical standby database
•
Far Sync standby database
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