IC88903: TIVOLI STORAGE MANAGER CLIENT IGNORES CTIME CHANGE

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The Tivoli Storage Manager client ignores files during
    incremental backup when only the CTIME has changed. This may
    lead to problems with applications
    which check for CTIME change, like "GPFS mmbackup".
    
    Customer/L2 Diagnostics:
    You can recreate the issue as follows:
    ls -al /some/file
    -rw-r--r--    1 root     system        32768 Nov 28 15:04
    /some/file
    1) backup the file:
    "dsmc incr /some/file"
    2) change the file access permissions, e.g.:
    "chmod o-r /some/file"
    3) restore them back, e.g.:
    "chmod o+r /some/file"
    4) perform the incremental again:
    "dsmc incr /some/file"
    
    The last "dsmc incr" command should update the file CTIME
    attribute on the Tivoli Storage Manager server (as e.g. MMBACKUP
    expects) but it does not.
    
    Tivoli Storage Manager Versions Affected:
    All Tivoli Storage Manager client versions on UNIX/Linux
    
    Initial Impact:
    Middle
    
    Additional Keywords:
    ctime, attribute, update, mmbackup, SONAS, GPFS, TSM
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Backup-archive clients version 5.4 to 6.4    *
    *                 running on AIX and Linux platforms backing   *
    *                 up GPFS file systems.                        *
    ****************************************************************
    * PROBLEM DESCRIPTION: See ERROR DESCRIPTION.                  *
    ****************************************************************
    * RECOMMENDATION: Apply fixing level when available. This      *
    *                 problem is currently projected to be fixed   *
    *                 in levels 6.3.2 and 6.4.1. Note that until   *
    *                 these levels are available, this             *
    *                 information is subject to change at the      *
    *                 discretion of IBM.                           *
    ****************************************************************
    dsmc incremental command didn't update object's attributes on
    the server if only the last changed time and date (ctime
    attribute) has been changed.
    

Problem conclusion

  • Upon the fix, during incremental backup, if the only attribute
    that is changed is the last changed time and date (ctime
    attribute), the last changed time and date (ctime attribute)
    is updated on the server.
    Note: the fix is effective for GPFS file systems only.
    The "Backing up your data" chapter of the IBM Tivoli Storage
    Manager for UNIX and Linux Backup-Archive Clients Installation
    and User's Guide has been updated appropriately.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC88903

  • Reported component name

    TSM CLIENT

  • Reported component ID

    5698ISMCL

  • Reported release

    63A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-12-06

  • Closed date

    2013-02-11

  • Last modified date

    2013-02-11

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

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

Modules/Macros

  • DSMC
    

Publications Referenced
SC23979105 SC23979106      

Fix information

  • Fixed component name

    TSM CLIENT

  • Fixed component ID

    5698ISMCL

Applicable component levels

  • R63A PSY

       UP

  • R63L PSY

       UP

  • R64A PSY

       UP

  • R64L PSY

       UP



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Document information


More support for:

Tivoli Storage Manager

Software version:

63A

Reference #:

IC88903

Modified date:

2013-02-11

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