An extended enterprise environment often includes both centralized hosts and distributed workstations. Most applications in an extended enterprise share data to some degree. Therefore, data in an extended enterprise must be in a form that can be shared throughout an enterprise. In addition, applications must at all times access latest copy of the data. Avoiding unnecessary data duplication is also desirable.
Uncontrolled duplication leads to storage management problems and wasting of storage resources.
In contrast, controlled duplication for backup and migration is useful and necessary. Wherever applications run in your enterprise, they should be able to access data without unnecessary uploading and downloading. All data sets accessed must be cataloged in an ICF catalog. All data sets accessed must reside on direct access storage. For data sets to be SMS-managed, they must be assigned a storage class.