Traditional and Migration Model Upgrades

You can upgrade CA Service Catalog to Release 12.8 using either a migration model or a traditional model.

In a traditional model, you run the upgrade program on existing CA Service Catalog computers.
In a migration model, you install CA Service Catalog 12.8 products and components on new computers. When you install CA Service Catalog on the new computers, you use the existing CA MDB and CA EEM computers.
The migration model provides greater flexibility than the traditional model. If a system failure or other unforeseen event occurs in the new environment, you can more efficiently restore the previous environment. In many cases, you can test the new environment more thoroughly when you use the migration model. If you select this option, follow the guidelines for migration model upgrades.

The scope and limitations of an upgrade include both general and release-specific requirements for traditional and migration model upgrades.

The tasks to prepare for the upgrade apply to both traditional and migration model upgrades.