Words and Phrases
Delta migration methods
There are two methods to complete the delta migration:
- Method 1: Manually export/import a single UNL file
- Method 2: Automatically export/import multiple UNL files
You need to use the delta migration tool to generate an unload script, and then use this unload script to export and import data manually. This method is simple and you can use it to migrate delta data between two systems with similar versions (for example, from Service Manager 7.11 to Service Manager 7.11).
Note If the table structures of the new and original Service Manager systems are different, use method 2 to migrate the delta data.
You need to create background schedules to export the tables that contain the delta data into the UNL files in a specified original folder. Then, move the entire folder to the new Service Manager system and create background schedules to import them.
Migration by using this method uses the background schedule tasks to export and import the delta data, so it has minimal performance impact on the running production system. You can apply this method to migrate delta data between two systems with different versions (for example, from Service Manager 7.11 to Service Manager 9.34). Most of Service Manager upgrade projects should use method 2.