Capture Enhancements
Controlling the Capture Program
The Capture program is controlled by signals that you or the Apply program can store in the signal table, IBMSNAP_SIGNAL. This table, along with other replication control tables, ensures that the Capture and Apply programs communicate effectively with each other and with the Replication Alert Monitor.
Capture uses signals from IBMSNAP_SIGNAL for the following situations:
To determine when to start capturing changes for a particular table
To determine when to terminate
Whether it must perform update-anywhere replication
To provide the log sequence number for setting a precise endpoint for Apply events
The signal table also allows for precise termination of log record reading and for users to communicate ...
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