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PM48936: PERFORMANCE IMPROVEMENTS AND BUG FIXES FOR 5697-J06 IBM BACKUP AND RESTORE MANAGER FOR Z/VM 1.2.0

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APAR status

  • Closed as program error.

Error description

  • This PTF provides multiple performance improvements and bug
    fixes.
    .
    Performance: Backups to tape may benefit from a reduction in
    output device I/O volume.
    .
    Performance: Backups of CMS files from minidisks and SFS
    resources may benefit from a reduction in the number of CSL
    (Callable Service Library) routine invocations.
    .
    Bug fix: Incremental backup of some complex SFS hierarchies
    could exhibit impaired performance. This update corrects the
    problem.
    .
    Bug fix: Diagnostic run-time dump now correctly reports
    "EXECMAP" information.
    .
    Bug fix: In some configurations, deletion of expired backup
    Catalog entries did not fully remove volume forward-chain
    entries from the backup catalog. This update corrects the
    omission, and introduces additional consistency checks of
    the backup catalog file space to detect and correct the problem.
    .
    Behavior change: Backup catalog file space consistency
    checks are now executed at BKRCATLG initialization as well
    as during "EXPIRE" processing. Prior to this update, consistency
    checks were executedonly during the final stage of content
    expiration processing.
    .
    Bug fix: An error in ECKD DASD track image backup I/O error
    Recovery could produce inconsistent state information during
    a backup job. This update corrects the problem, and handles
    unrecoverable DASD errors as a non-retryable condition.
    .
    Behavior change: When an incremental backup job refers to a
    non-existent baseline full backup job instance, the net result
    is that a full backup of all objects in the backup job is
    performed. This update will display a warning via message 9357W
    in the backup job log when this condition is detected.
    .
    Bug fix: LOADDDL has been updated to display source data
    Validation messages from the BKRUME message repository
    instead of in-line code during restore-to-rdr processing.
    .
    Behavior change: The backup job log continues to document
    Unsuccessful minidisk LINK attempts via message 9303W.
    The end-of-job activity summary report has been extended to
    itemize minidisks which could not be linked during backup job
    execution.
    

Local fix

  • 
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: This PTF provides multiple performance  *
    *                      improvements and bug fixes.             *
    *                                                              *
    *                      Performance: Backups to tape may        *
    *                      benefit from a reduction in output      *
    *                      device I/O volume.                      *
    *                                                              *
    *                      Performance: Backups of CMS files from  *
    *                      minidisks and SFS resources may benefit *
    *                      from a reduction in the number of CSL   *
    *                      (Callable Service Library) routine      *
    *                      invocations.                            *
    *                                                              *
    *                      Bug fix: Incremental backup of some     *
    *                      complex SFS hierarchies could exhibit   *
    *                      impaired performance. This update       *
    *                      corrects the problem.                   *
    *                                                              *
    *                      Bug fix: Diagnostic run-time dump now   *
    *                      correctly reports "EXECMAP"             *
    *                      information.                            *
    *                                                              *
    *                      Bug fix: In some configurations,        *
    *                      deletion of expired backup catalog      *
    *                      entries did not fully remove volume     *
    *                      forward-chain entries from the backup   *
    *                      catalog. This update corrects the       *
    *                      omission, and introduces additional     *
    *                      consistency checks of the backup        *
    *                      catalog file space to detect and        *
    *                      correct the problem.                    *
    *                                                              *
    *                      Behavior change: Backup catalog file    *
    *                      space consistency checks are now        *
    *                      executed at BKRCATLG initialization as  *
    *                      well as during "EXPIRE" processing.     *
    *                      Prior to this update, consistency       *
    *                      checks were executed only during the    *
    *                      final stage of content expiration       *
    *                      processing.                             *
    *                                                              *
    *                      Bug fix: An error in ECKD DASD track    *
    *                      image backup I/O error recovery could   *
    *                      produce inconsistent state information  *
    *                      during a backup job. This update        *
    *                      corrects the problem, and handles       *
    *                      unrecoverable DASD errors as a          *
    *                      non-retryable condition.                *
    *                                                              *
    *                      Behavior change: When an incremental    *
    *                      backup job refers to a non-existent     *
    *                      baseline full backup job instance, the  *
    *                      net result is that a full backup of all *
    *                      objects in the backup job is performed. *
    *                      This update will display a warning via  *
    *                      message 9357W in the backup job log     *
    *                      when this condition is detected.        *
    *                                                              *
    *                      Bug fix: LOADDDL has been updated to    *
    *                      display source data validation messages *
    *                      from the BKRUME message repository      *
    *                      instead of in-line code during          *
    *                      restore-to-rdr processing.              *
    *                                                              *
    *                      Behavior change: The backup job log     *
    *                      continues to document unsuccessful      *
    *                      minidisk LINK attempts via message      *
    *                      9303W. The end-of-job activity summary  *
    *                      report has been extended to itemize     *
    *                      minidisks which could not be linked     *
    *                      during backup job execution.            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • 
    

Temporary fix

  • 
    

Comments

  • 
    

APAR Information

  • APAR number

    PM48936

  • Reported component name

    TAPE MANAGER Z/

  • Reported component ID

    5697J0800

  • Reported release

    120

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2011-09-28

  • Closed date

    2011-09-29

  • Last modified date

    2012-01-31

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

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

    UK72432

Modules/Macros

  •    BAKSRVR  BKRBLSRV BKRUME   CATSRVR  DELCAT
    DIAG2FC  DUMPCKD  DUMPEDF  DUMPFBA  DUMPSFS  LOADDDL  MAKEJOB
    RVB$JOB
    

Fix information

  • Fixed component name

    BACKUP RESTORE

  • Fixed component ID

    5697J0600

Applicable component levels

  • R120 PSY UK72432

       UP11/09/30 P 1201

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.

[{"Line of Business":{"code":"LOB35","label":"Mainframe SW"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMR4R","label":"Backup and Restore Manager for z\/VM"},"ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"1.2.0"}]

Document Information

Modified date:
22 March 2021