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User Guide
Introducing OpenEdge Replication : OpenEdge Replication terminology : Primary and secondary databases

Primary and secondary databases

There are two distinct database roles within OpenEdge Replication: the primary database and the secondary database.
The primary database is the database that is updated from your application; you initially enable the primary database as the OpenEdge Replication source database.
The secondary database is the initial replica of the primary database; you initially enable the secondary database as the OpenEdge Replication target database. For each source database, you can configure up to two target databases.