IC62160: TIVOLI STORAGE MANAGER CLIENT PERFORMANCE DEGRADATION IF HSM NOT INSTALLED.

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • TSM client for GPFS enabled platforms can repeatedly call the
    mmdsm command, to discover the instance number, for each file
    sent to server even if HSM is not installed or not configured.
    This can lead to performance degradation or hangs of the client.
    
    Customer/L2 diagnostic:
    a service trace will show many occurences of:
    
    07/11/09   23:40:40.974 [023435] [3055823776] : dmiSDR.cpp
    (1729): : Executing "/usr/lpp/mmfs/bin/mmdsm dsmGetNodeNumber"
    
    TSM Versions Affected:
    6.1 on Linux and AIX
    
    Initial Impact:
    Medium
    

Local fix

  • Create the /etc/adsm/SpaceMan/config/ tree, then create a dummy
    instance file using command:
    echo -ne \\0001\\0000 >/etc/adsm/SpaceMan/config/instance
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: TSM clients V6.1.0 and higher running on     *
    *                 AIX and Linux platforms.                     *
    ****************************************************************
    * PROBLEM DESCRIPTION: See ERROR DESCRIPTION.                  *
    ****************************************************************
    * RECOMMENDATION: Apply fixing level when available. This      *
    *                 problem is currently projected to be fixed   *
    *                 in level 6.1.2 and 6.1.3.                    *
    *                 Note that this is subject                    *
    *                 to change at the discretion of IBM.          *
    ****************************************************************
    The client attepmted to invoke the mmdsm command for every
    file processed during backup operation even if HSM was not
    installed. This caused a performance degradation of the whole
    backup process.
    

Problem conclusion

  • The client has been changed so that it only invokes mmdsm
    when HSM is installed.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC62160

  • Reported component name

    SANERGY FOR TSM

  • Reported component ID

    5698ISESN

  • Reported release

    61L

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-07-23

  • Closed date

    2009-08-17

  • Last modified date

    2009-11-19

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

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

Fix information

  • Fixed component name

    TSM CLIENT

  • Fixed component ID

    5698ISMCL

Applicable component levels

  • R61A PSY

       UP

  • R61L PSY

       UP



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Document information


More support for:

Tivoli Storage Manager

Software version:

61L

Reference #:

IC62160

Modified date:

2009-11-19

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