Primary-Target Replication System
In the primary-target replication system, the flow of information is in one direction.
In primary-target replication, all database changes originate at the primary database and are replicated to the target databases. Changes at the target databases are not replicated to the primary.
- One-to-many replication
In one-to-many (distribution) replication, all changes to a primary database server are replicated to many target database servers. Use this replication model when information gathered at a central site must be disseminated to many scattered sites.
- Many-to-one replication
In many-to-one (consolidation) replication, many primary servers send information to a single target server. Use this replication model when many sites are gathering information (for example, local field studies for an environmental study) that needs to be centralized for final processing.