Standby Applications

Protect the data in your replication system by maintaining separate (standby) copies of primary data.

Two possible standby methods are:

Warm standby application – a pair of databases from the same vendor, one of which is a backup copy of the other. Client applications update the active database; Replication Server maintains the standby database by copying supported operations to the active database.
Hardware data mirroring – a form of hot standby application. With the use of additional hardware, data mirroring maintains an exact copy of the primary data by reproducing all operations on the primary data.

Compare Methods
Weigh the differences between a hot standby application and a warm standby application.
Warm Standby
A warm standby application is a pair of databases, one of which is a backup copy of the other. Client applications update the active database; Replication Server maintains the standby database as a copy of the active database.
Hardware Data Mirroring
To ensure the highest data availability, you can mirror the most critical data in the replication system. Mirroring duplicates I/O operations, maintaning two identical copies of the data.

Parent topic: Preventive Measures

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