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OA67351: NEW FUNCTION - Emulated structure calculation CFLEVEL 26

A fix is available

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APAR status

  • Closed as new function.

Error description

  • New function
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Installations exploiting Parallel Sysplex,                   *
    * particularly those using the z/OSMF Sysplex                  *
    * Application, at z/OS V2R5 (HBB77D0) and                      *
    * above.                                                       *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Enhancements to the IXLCSP                                   *
    * structure calculation service -                              *
    * software emulation of CFLevel 26.                            *
    *                                                              *
    * SYSPLEXDS E9175/K                                            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Install the applicable PTF on all systems in                 *
    * the sysplex.  A rolling IPL is sufficient to                 *
    * activate the support.                                        *
    ****************************************************************
    It is highly desirable to compute sizes for coupling facility
    (CF) structures at CFLevels not yet installed in the system, to
    facilitate capacity planning and migration.  Today, structure
    size calculations can be performed directly by the CF or
    emulated for CFLevel 25.  With the release of CFLevel 26
    (provided by IBM z17), we wish to continue adding to this
    support, allowing users to specify the new CFLevel for which
    its structure sizing calculation is to be performed through the
    IXLCSP API.
    

Problem conclusion

Temporary fix

Comments

  • This APAR provides support for software emulation of CFLevel 26
    structure computation functions.  When installed, the IXLCSP
    structure computation service can perform size and count
    calculations for CFLevel 26 even when there is no CF at that
    level configured in the sysplex.  For z/OS V2R5 (HBB77D0), we
    can support only one CFLevel and will replace the existing
    CFLevel 25 support with CFLevel 26, while z/OS 3.1 (HBB77E0)
    and z/OS 3.2 (HBB77F0) will support both CFLevel 25 and CFLevel
    26.
    

APAR Information

  • APAR number

    OA67351

  • Reported component name

    CROSS SYS.EXT.S

  • Reported component ID

    5752SCIXL

  • Reported release

    7D0

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / New Function / SYSPLXDS /

  •  

    Xsystem

  • Submitted date

    2025-01-03

  • Closed date

    2025-05-28

  • Last modified date

    2025-07-02

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UJ97260 UJ97261 UJ97277

Modules/Macros

  • IXLCFMT2 IXLCFMT1 IXCL2BAP IXCI2JST IXCF1VCC IXCI2PH1 IXCL2SCL
    IXCL2SCC IXLYCON
    

Fix information

  • Fixed component name

    CROSS SYS.EXT.S

  • Fixed component ID

    5752SCIXL

Applicable component levels

  • R7F0 PSY UJ97261

       UP25/06/11 P F506  

  • R7D0 PSY UJ97277

       UP25/06/11 P F506  

  • R7E0 PSY UJ97260

       UP25/06/11 P F506  

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU011","label":"Systems - zSystems software"},"Product":{"code":"SG19O"},"Platform":[{"code":"PF054","label":"z Systems"}],"Version":"7D0"}]

Document Information

Modified date:
02 July 2025