PI05573: V10 COPY UTILITY ENHANCEMENTS.

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When COPY utility processes the list of objects in parallel for
    image copies being written into tape devices, the customer
    found if the objects are small or near to empty, they are
    always copied to a small number of tape volumes, not spread
    among the available volumes. This may impact the parallel
    degree when RECOVER utility tries to restore these image copy
    datasets.
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 10 for z/OS and DB2 11 for z/OS      *
    *                 users of the COPY and RECOVER utilities      *
    *                 with the PARALLEL option.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: Increased elapsed time during the       *
    *                      RECOVER utility in the RESTORE          *
    *                      phase when the input image copies       *
    *                      are not spread evenly across            *
    *                      multiple tape stacks by the COPY        *
    *                      utility.                                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
      A customer noticed a degradation in RECOVER utility
    RESTORE phase performance when the input image copies on
    multiple tape stacks created by the COPY utility were not
    spread evenly across the tape stacks.
      The image copies for small objects were mostly contained in
    the first tape stack when COPY with the PARALLEL option was
    used.  This caused inefficiencies during RECOVER RESTORE
    phase processing.
    

Problem conclusion

  • The COPY utility logic has been modified so that image copy
    data sets stacked on tape are spread more evenly across the
    tape stacks when the PARALLEL option is specified.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI05573

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-11-06

  • Closed date

    2014-02-19

  • Last modified date

    2014-04-02

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

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

    UI15308 UI15309

Modules/Macros

  • DSNUBBID DSNUCBMT DSNUGULM DSNUGUTC
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UI15308

       UP14/03/07 P F403

  • RB10 PSY UI15309

       UP14/03/07 P F403

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:

DB2 for z/OS

Software version:

A10

Reference #:

PI05573

Modified date:

2014-04-02

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