IC64484: SLOW PERFORMANCE FOR NDMP BACKUPS WITH TOC CREATION ( AFSTOREREMOTE)

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The backup performance for NAS backups with the TOC=YES or
    TOC=PREFERRED keyword might be severely degraded using a Tivoli
    Storage Manager V6 server.
    
    If you think you are facing the symptom, a server
    instrumentation trace will show a highly active
    AfStoreRemoteThread.
    For help setting up this trace please contact your support
    representative.
    
     In the example below, about the whole time the trace was
    collected
     (03:54:49.177-->04:18:04.584) the thread was fetching
    information from DB2.
    
     Thread 2934 AfStoreRemoteThread parent=2933
                       03:54:49.177-->04:18:04.584
     Operation      Count  Tottime  Avgtime  Mintime  Maxtime
    InstTput totKB
     ---------------------------------------------------------------
    --------
     DB2 Fetch Exec  21158 1394.111    0.066    0.003    0.097
     DB2 Fetch       21157    0.276    0.000    0.000    0.000
     DB2 MFetch       2402    0.167    0.000    0.000    0.000
     Thread Wait        26    0.000    0.000    0.000    0.000
     Unknown                  0.851
     ---------------------------------------------------------------
    --------
     Total                 1395.407
    
    NOTE: The AfStoreRemoteThread referenced above is used for
          traditional NDMP support where images are stored in a
          remote tape library.  This issue also applies to filer-
          to-server configurations in which images are stored in
          a native storage pool.  If this is the case, the thread
          in question will be the AfStoreNativeThread instead of the
          AfStoreRemoteThread.
    
      Tivoli Storage Manager Versions Affected: all V6
      Initial Impact: High
      Additional Keywords: NDMP NAS ZZ61 TSM
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of IBM Tivoli Storage Manager      *
    *                 performing NDMP backup.                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: See Error Description.                  *
    ****************************************************************
    * RECOMMENDATION: Apply fixing level when available.  This     *
    *                 problem is currently projected to be fixed   *
    *                 in server level 6.1.3 .  Note that this is   *
    *                 subject to change at the discretion of IBM.  *
    ****************************************************************
    See Error Description.
    

Problem conclusion

  • The performance has been improved.
    Affected Platforms: AIX, HP-UX, Sun Solaris, Linux, Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC64484

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    61L

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-11-11

  • Closed date

    2009-11-16

  • Last modified date

    2009-12-14

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

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

Modules/Macros

  • TOCBUILD TOCDEFS  TBTBL
    

Fix information

  • Fixed component name

    TSM SERVER

  • Fixed component ID

    5698ISMSV

Applicable component levels

  • R61A PSY

       UP

  • R61H PSY

       UP

  • R61L PSY

       UP

  • R61S PSY

       UP

  • R61W PSY

       UP



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Document information


More support for:

Tivoli Storage Manager

Software version:

61L

Reference #:

IC64484

Modified date:

2009-12-14

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