Planning to install in a saved segment
Defining frequently used data (such as licensed programs) as saved segments provides several advantages:
- Several users can access the same physical storage, therefore use of real storage is minimized.
- Using saved segments decreases the input and output rate and the DASD paging space requirements, thus improving the performance of the virtual machine.
- Saved segments attached to a virtual machine can reside above its defined virtual storage.
- In the install process a physical saved segment is defined and its logical saved segment loaded.
Segment planning should be done at the system level. A VMSES/E tool, VMFSGMAP provides system-level management support functions.
In Step 5: Define and build High Level Assembler saved segment (optional), the process of defining and building a saved segment is shown in detail. If you are unfamiliar with this process, refer to z/VM: Saved Segments Planning and Administration.