DB2 provides migration support to allow you to convert back-level DB2 databases and instances to a format usable by DB2 Universal Database Version 7. Database migration is not required to move from DB2 Version 7.1 to Version 7.2.
The following DB2 releases are supported by the DB2 Universal Database Version 7 migration process:
Migration to DB2 Universal Database Version 7
Migration to DB2 Enterprise - Extended Edition Version 7
Some incompatibilities exist between DB2 Version 7 and previous releases of DB2. An incompatibility is a part of DB2 that works differently than it did in a previous release. If used in an existing application, the incompatibility will produce an unexpected result, necessitate a change to the application, or reduce performance. For a list of incompatibilities, see the Incompatibilities Between Releases appendix in the Administration Guide: Planning. This appendix describes the incompatibilities and their symptoms or effects, and suggests possible resolutions.
Depending on your platform, there may be certain pre-installation and post-installation tasks that you must perform to migrate successfully to the Version 7 format. For more information on migrating to DB2 Version 7, refer to the Quick Beginnings manuals for your platform.
The function provided by the Visual Warehouse product has been integrated into DB2 Universal Database and DB2 Warehouse Manager. This function is accessed in DB2 Universal Database through the Data Warehouse Center. For detailed planning and migration information, see the book: Migrating to DB2 UDB Version 7.1 in a Visual Warehouse Environment, SG24-6107.