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.

Element or feature:

DFSORT.

When change was introduced:

z/OS V2R1.

Applies to migration from:

z/OS V1R13 and z/OS V1R12.

Timing:

Before the first IPL of z/OS V2R1.

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: See the following information:

For details about the EXPOLD and EXPRES installation options, see z/OS DFSORT Installation and Customization.