Creating and using hiperspaces

A hiperspace is a range of up to two gigabytes of contiguous virtual storage addresses that a program can use as a buffer. Like a data space, a hiperspace holds only data, not common areas or system data; code does not execute in a hiperspace. Unlike data in a data space, data in a hiperspace is not directly addressable.

The DSPSERV macro manages hiperspaces. The TYPE=HIPERSPACE parameter tells the system that it is to manage a hiperspace rather than a data space. Use DSPSERV to:

Create a hiperspace
Release an area in a hiperspace
Delete a hiperspace
Expand the amount of storage in a hiperspace currently available to a program.

To manipulate data in a hiperspace, your program brings the data, in blocks of 4K bytes, into a buffer area in the address space. The program can use the data only while it is in the address space. You can think of this buffer area as a "view" into the hiperspace. The HSPSERV macro read operation manages the transfer of the data to the address space buffer area. If you make updates to the data, you can write it back to the hiperspace through the HSPSERV write operation.

The data in the hiperspace and the buffer area in the address space must both start on a 4K byte boundary.

This information helps you create, use, and delete hiperspaces. It describes some of the characteristics of hiperspaces, how to move data in and out of a hiperspace; and how data-in-virtual can help you control data in hiperspaces. In addition, z/OS MVS Programming: Assembler Services Reference ABE-HSP contains the syntax and parameter descriptions for the macros that are mentioned in this information.