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IT17767: UNEXPECTED INCREMENTAL BACKUP INSTEAD OF SNAPDIFF DIFFERENCE SNAPSHOT PROCESSING WHEN USING REMOTE DESKTOP CONNECTION

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APAR status

  • Closed as program error.

Error description

  • A snapdiff backup (snapshot difference) performed by an user
    that is connected remotely using Microsoft Remote Desktop, will
    be a traditional incremental backup instead of the expected
    differences snapshot when the user disconnects from the remote
    session between backup runs.
    If snapdiff backups are scheduled, the next scheduled backup
    after a remotely connected user initiated backup will also
    again be a traditional increment backup.
    
    The client uses a staging directory to keep snapdiff
    information between backup runs.
    The client option used to define that directory is
    STAGINGDIRECTORY.
    By default, when this option is not set, the location of this
    directory follows these rules :
    The client checks for the existence of the USER environment
    variables in the following order, and uses the first path found:
    1. The path that is specified by the TMP user variable
    2. The path that is specified by the TMP system variable
    3. The path that is specified by the TEMP user variable
    4. The path that is specified by the TEMP system variable
    5. The Windows system directory
    
    The unexpected traditional incremental backup is seen because
    the snapdiff information stored in the staging directory used
    to enable difference snapshot backup is deleted because the
    directory itself is deleted when the user logs off from the
    Remote Desktop session.
    
    Tivoli Storage Manager \ Spectrum Protect Versions Affected:
    All supported versions of Tivoli Storage Manager \ Spectrum
    Protect Client on Windows only
    
    Initial Impact: Low
    
    Additional Keywords: TSM rfe 95278 cache Netapp
    

Local fix

  • Avoid using a remote desktop connected user to perform the
    backups
    or
    define a custom location that will not be affected with the
    client option : STAGINGDIRECTORY
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Backup-archive client versions 6.4, 7.1 and 8.1.0 running on *
    * all Microsoft Windows platforms.                             *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See ERROR DESCRIPTION                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * This issue is projected to be fixed in the Backup-Archive    *
    * Client version 8.1.2 on all Microsoft Windows x64 and Linux  *
    * x86 platforms                                                *
    * Note that this is subject to change at the discretion of     *
    * IBM.                                                         *
    ****************************************************************
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IT17767

  • Reported component name

    TSM CLIENT

  • Reported component ID

    5698ISMCL

  • Reported release

    71W

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-11-02

  • Closed date

    2017-03-24

  • Last modified date

    2017-03-24

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

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

Modules/Macros

  • dsmc
    

Fix information

  • Fixed component name

    TSM CLIENT

  • Fixed component ID

    5698ISMCL

Applicable component levels

  • R81W PSY

       UP

  • R81L PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 71W

Reference #: IT17767

Modified date: 24 March 2017