What can a program do with a data space or a hiperspace?

Programs can use data spaces and hiperspaces to:

Obtain more virtual storage than a single address space gives a user.
Isolate data from other tasks in the address space.
Data in an address space is accessible to all programs executing in that address space. You might want to move some data to a data space or hiperspace for security or integrity reasons. Use this space as a way to separate your data logically by its own particular use.
Provide an area in which to map a data-in-virtual object.

You can place all types of data in a data space or hiperspace, rather than in an address space or on DASD. Examples of such data include:

Because data spaces and hiperspaces do not include system areas, the cost of creating and deleting them is less than that of an address space.

To help you decide whether you need this additional storage area, some important questions are answered in the following topics.