Invoking z System authorized interfaces for zEnterprise Data Compression

This topic describes how to invoke z System authorized interfaces for zEnterprise® Data Compression by:

z System authorized compression services

To compress data with zEDC, your installation must meet the system requirements. See Requirements for zEnterprise Data Compression for the system requirements for zEDC.

All z/OS® exploitation of zEDC handles mixed hardware and software levels. Compatibility APAR OA41245 provides software decompression for installations running with z/OS V1R13 or V1R12. The same software decompression is also provided for installations running z/OS V2R1 on pre-IBM® zEnterprise EC12 (with GA2 level microcode). This allows access to compressed data on all combinations of environments.

Table 1. Compression and decompression with z System authorized interfaces for zEDC
Hardware level	z/OS level	zEDC Express	Description
zEC12 (with GA2 level microcode)	z/OS V2R1	Active	zEDC is used for both data compression and decompression.
zEC12 (with GA2 level microcode)	z/OS V2R1	Not Active	Requirements are not met for zEDC. Software-based decompression services for zEDC Express compressed data are used because zEDC Express compression is not available.
Pre-zEC12 (with GA2 level microcode)	z/OS V2R1	N/A	Requirements are not met for zEDC. Software-based decompression services for zEDC Express compressed data are used because zEDC Express compression is not available.
Pre-zEC12 (with GA2 level microcode)	Pre-z/OS V2R1	N/A	Requirements are not met for zEDC. Software-based decompression services for zEDC Express compressed data are used because zEDC Express compression is not available. APAR OA41245 is required to use the software-based decompression services.