PM84832: IMS DEDB FAST RECOVERY ENHANCEMENT IN SUPPORT OF IMS V12 APAR PM69149

A fix is available

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APAR status

  • Closed as new function.

Error description

  • IMS DEDB Fast Recovery enhancement in support of IMS V12 APAR
    PM69149 (PTF UK83042).
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All IMS DEDB FAST RECOVERY Version 2         *
    *                 Release 2 (FMID=H1J2220) users who use an    *
    *                 extended format OLDS in IMS V12.             *
    ****************************************************************
    * PROBLEM DESCRIPTION: This APAR is DFR version for IMS V12    *
    *                      APAR PM69149 (PTF is UK83042).          *
    *                      - PM69149                               *
    *                      When an extended format OLDS dataset    *
    *                      has multiple extents on a volume,       *
    *                      the total size of the OLDS is not       *
    *                      calculated properly resulting in an     *
    *                      ABEND S0C1 which is preceded by an      *
    *                      ABEND D37-04.                           *
    *                      *                                       *
    *                      This condition is because the space for *
    *                      OLDS was allocated without using        *
    *                      SPACE=(CYL,(xx),,CONTIG).               *
    *                      The CONTIG parameter is still required  *
    *                      for allocating an extended format OLDS. *
    *                      IMS V12 APAR:PM69149 is a problem that  *
    *                      was encountered because of a customer   *
    *                      user error.                             *
    *                      However, that problem uncovered the     *
    *                      fact that DFSFDLA0 was really not       *
    *                      calculating sizes properly.             *
    *                      So APAR:PM69149 fixed the sizing        *
    *                      calculation, but the documentation is   *
    *                      still accurate about what is supported. *
    ****************************************************************
    * RECOMMENDATION: Apply the maintenance for this APAR.         *
    ****************************************************************
    - PM84832 for IMS DEDB Fast Recovery
    DFR calculates the size of an extended format OLDS by adding up
    the size of each individual extent.
    When an OLDS contains multiple extents on a volume, a problem
    in DFRFDLAC results in the extent descriptor of the first
    extent to be counted for each extent. So if three extents
    exist, the size of the first extent is counted 3 time. This
    is because the pointer to the extent descriptor is not properly
    incremented after processing an extent and thus always points
    to the first extent.
    

Problem conclusion

Temporary fix

Comments

  • The following module has been modified.
    *
    DFRFDLAC - This module was changed to increment the correct
               pointer to the extent descriptor before processing
               the 2nd and all subsequent extents on a volume in
               order to get an accurate size calculation.
    *
    

APAR Information

  • APAR number

    PM84832

  • Reported component name

    DEDB FAST RECOV

  • Reported component ID

    5655E3200

  • Reported release

    220

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-03-14

  • Closed date

    2013-03-15

  • Last modified date

    2013-04-02

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

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

    UK92541

Modules/Macros

  •    DFRFDLAC
    

Fix information

  • Fixed component name

    DEDB FAST RECOV

  • Fixed component ID

    5655E3200

Applicable component levels

  • R220 PSY UK92541

       UP13/03/16 P F303

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.



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Document information


More support for:

IMS Tools
IMS DEDB Fast Recovery

Software version:

2.2.0

Reference #:

PM84832

Modified date:

2013-04-02

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