This IBM® Redpaper™ publication describes how class transitions differ from the classic migration processes and how they can influence application performance levels.

Performance is focused on the following goals:

• Reduce the number of I/Os required to manage the storage
• Optimize data locations to the appropriate device type during its lifecycle

This paper applies to the IBM z/OS® V2.2 level.

Understanding the challenges

Classic migration and recall versus class transition

Implementing and using class transition

Scenarios