Summary of changes for z/OS Version 2 Release 2 (V2R2)

New

• New read-only variable &USER_ACSVAR for use in ACS routines. For details, refer to Writing ACS routines.
• New Total Space Alert Threshold % and Track-Managed Space Alert Threshold % attributes for defining a pool storage group. For details, refer to Values for defining a pool storage group.

Changed

The Reduce Space Up To (%) attribute for data classes is now used when allocating secondary extents, to provide more efficient use of space. For details, refer to Specifying attributes to handle space constraints during allocation.