Replication Agent uses the Java Database Connectivity (JDBC) protocol for all communications. However, some supported databases require the Open Database Connectivity (ODBC) protocol. When connecting to a primary database, Replication Agent connects to either the JDBC driver or the JDBC/ODBC bridge provided by the database vendor.
Figure 1-2 illustrates the communication between Replication Agent and a primary database using a JDBC driver.
Figure 1-2: Replication Agent primary database communication
Replication Agent uses the Sybase JDBC driver (jConnect™ for JDBC™) to communicate with all Open Client and Open Server™ applications, such as Adaptive Server® Enterprise and Replication Server. Each Replication Agent instance uses a single instance of jConnect for JDBC.
Figure 1-3 illustrates the communication between Replication Agent and the primary Replication Server and its RSSD.
Figure 1-3: Replication Agent communication with Replication Server
While replicating transactions, the Replication Agent maintains connections with both the primary database and the primary Replication Server, and it may occasionally connect to the RSSD of the primary Replication Server to retrieve replication definition data.
