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

New

• Added information on using a non-SMS managed VSAM linear data set with extended addressability as a zFS version root, in Using a non-SMS managed data set for a zFS version root larger than four gigabytes.
• Added information on using hiperspace caching for PDSEs, in Hiperspace caching for PDSE.

Changed

• VSAM information was updated in Acquiring Buffers, Using Hiperspace Buffers with LSR, and Deciding the Size of a Virtual Resource Pool.

• Space constraint attributes for a data class may now apply to the secondary quantity during allocation, as well as the primary quantity, resulting in more efficient use of space. For more information, refer to Allocation of Data Sets with the Space Constraint Relief Attributes.

Moved

Using BSAM, BPAM, and QSAM support for XTIOT, uncaptured UCBs, and DSAB above the 16 MB line was moved into this information from a previous edition of DFSMS Using the New Functions.

Deleted

No content was removed from this information.