Release 10.1B: OpenEdge Replication
User Guide
OpenEdge Replication failure recovery terminology
With the introduction of failback processing to OpenEdge Replication, it is important to further clarify some existing terminology, specifically as it relates to primary and secondary databases as well as source and target databases.
Primary database
A primary database is the database that is updated from your application; the primary database is the one you initially enable as the OpenEdge Replication source database. During a failure recovery, the role of this database can switch from source to target and then back again to source. However, while the role of the database might change, the database itself remains the primary database. (See the "Source database" section for details about the source database.)
Secondary database
A secondary database is the initial replica of the primary database; the secondary database is the one you initially enable as the OpenEdge Replication target database. During a failure recovery, the role of the secondary database can switch from target to source and then back again to target. (See the "Target database" section for details about the target database.)
Source database
The source database is the database that can be updated by users. The source database:
Target database
The target database is an identical copy of the source database. A second target database can be set up for additional redundancy. The target database:
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