No conflict detection   Select this option if you do not want any conflict detection. Uploaded updates are applied without checking for conflicts. This avoids having to fetch current row values from the consolidated database, so the synchronization of updates may be faster.

Row-based conflict detection   Select this option to use row-based conflict detection on upload. A conflict is detected if the row has been updated by both the remote and consolidated databases since the last synchronization. See upload_fetch table event and upload_update table event.

Column-based conflict detection   Select this option to use column-based conflict detection. A conflict is detected if the same column has been updated for the row in both the remote and consolidated databases. See upload_fetch_column_conflict table event.