Use EXPOLD=MAX and EXPRES=0 to prevent changed defaults
Description
Beginning with z/OS V2R1, IBM-supplied defaults have been changed to EXPOLD=50% (from EXPOLD=MAX) and to EXPRES=10% (from EXPRES=0). If you want DFSORT to use the old defaults, as in previous releases, you can set EXPOLD=MAX and EXPRES=0.
Table 1 provides more details about this migration action. Use this information to plan your changes to the system.
| Element or feature: | DFSORT. |
|---|---|
| When change was introduced: | z/OS V2R1. |
| Applies to migration from: | z/OS V1R13. |
| Timing: | Before the first IPL of z/OS V2R2. |
| Is the migration action required? | Yes, if the new defaults are not acceptable. |
| Target system hardware requirements: | None. |
| Target system software requirements: | None. |
| Other system (coexistence or fallback) requirements: | None. |
| Restrictions: | None. |
| System impacts: | None. |
| Related IBM® Health Checker for z/OS® check: | None. |
Steps to take
Follow these steps:
- Use ICEPRMxx members activated by a START ICEOPT started task command to set the EXPOLD=MAX or EXPRES=0 options, as appropriate.
- Alternatively, you can set EXPOLD=MAX or EXPRES=0 with the previous (less preferred) method of using the ICEMAC macro and usermods.
Reference information
For more information about the EXPOLD and EXPRES installation options, see z/OS DFSORT Installation and Customization.