The target Datareplicator can switch the import processing method on the basis of the source system's application handling. To switch the import processing method, you must establish the correspondence between events sent from the source system and the methods to be used.

If you are using the table-based import method, you can detect events during all import processes by using the message that is issued by the import definition server process when an event is detected. This makes it possible to start the next processing after the current processes are completed even when multiple import processes are underway.

The following figure shows an example of designing to enable switching of the import processing method when the source system switches from an online to a batch application.

Figure 4-45 Example of designing to enable switching of the import processing method

Explanation

• If the source system is executing an online application, the update information is imported sequentially using the transaction-based import method. When the online application terminates, the source system issues an import processing stop event.
• The target system stops import processing when it detects the import processing stop event.
• When batch processing progresses to some degree, the source system issues a table-based import restart event.
• The target system restarts import processing using the table-based import method when it detects the table-based import restart event.