Replication Agent for DB2

Replication Agent for DB2 is a replication system component that captures database transactions in a DB2 primary database on an OS/390 mainframe platform and sends them to Replication Server.

Figure 5-1 illustrates how Replication Agent for DB2 sends data to Replication Server.

Figure 5-1: Replication Agent data flow for DB2

Figure 5-2 illustrates how Replication Agent for D B 2 sends data to Replication Server. At the primary site, data flows from the primary D B 2 database to the D B 2 logs. The replication extract component of replication agent reads and retrieves relevant D B 2 log entries and passes them to the L T M for M V S component, which transfers the data to Replication Server.

Replication Agent for DB2 fits into a replication system as follows:

With Replication Agent for DB2, the primary database is DB2, which runs as a subsystem in OS/390. The transaction logs are DB2 logs.
Replication Agent for DB2 provides a log extract, called Replication Extract, that reads the DB2 logs and retrieves the relevant DB2 active and archive log entries for tables marked for replication.
LTM for MVS receives the data marked for replication from Replication Extract and transfers this data to Replication Server using the TCP/IP communications protocol.
Replication Server then applies the changes to the replicate databases.