The source Datareplicator extracts the update information from the source HiRDB's system log file and stores it in an extraction information queue file. If the source HiRDB is a parallel server, the source Datareplicator executes the extraction processing for each back-end server subject to extraction because there is a HiRDB system log file for each back-end server. In this case, Datareplicator stores the extraction status in the data linkage file and the extract-time status file.

If an error occurs during extraction processing, Datareplicator outputs error information to an error information file.

The source Datareplicator reads the update information in the extraction information queue file and sends it to the specified target system. If the source HiRDB is a parallel server, Datareplicator executes transmission for each applicable back-end server. In such a case, Datareplicator stores the transmission status in an extract-time status file.

If an error occurs during transmission, Datareplicator outputs the error to an error information file.