IBM Support

IT05420: LARGE FILELIST RESTORE/RETRIEVE SHOWS BAD PERFORMANCE FOR MULTILINKED OBJECTS.

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • During filelist restore/retrieve it is observed that it takes a
    lot of time to prepare the list of objects to process.
    The symptom is caused by the client calling the SameLink()
    function exponentially if the objects to process are
    multilinked, that is having two or more links to the same data
    object.
    In a service trace you can find evidence looking at a trace
    section like the following:
    07/04/2014 13:28:08.999 [008111] [4026529536] : restproc.cpp
    (13161): =========> Entering SameLink()
    07/04/2014 13:28:08.999 [008111] [4026529536] : restproc.cpp
    (12175): =========> Entering MakeRestList()
    07/04/2014 13:28:08.999 [008111] [4026529536] : restproc.cpp
    (12330): MakeRestList: added entry for '<FILESPACE>' '<HL>'
    '<LL>'
    07/04/2014 13:28:08.999 [008111] [4026529536] : restproc.cpp
    (11462): rpAdd(): restore list size: 10000
    The symptom occurs as the client compares attributes of each
    file with attributes of other files when adding a new file into
    the in-memory file list in order to find all the hard links for
    the file.
    If the filelist has many references to hard linked files, the
    hard link checking occurs on each of those objects and this
    checking may significantly add to the time needed for the
    creation of the in-memory file list.
      Tivoli Storage Manager Versions Affected: all supported
      Initial Impact: Medium
      Additional Keywords:TSM list huge links memory zz62 zz63 zz64
    zz71
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Tivoli Storage Manager for Client versions 6.3, 6.4 and 7.1  *
    * running on all AIX, HP IA64, Linux x86, Mac, and Solaris     *
    * platforms                                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See ERROR DESCRIPTION.                                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is currently *
    * projected to be fixed in levels 6.4.3 and 7.1.2.             *
    * Note that until these levels are available, this information *
    * is subject to change at the discretion of IBM.               *
    ****************************************************************
    *
    

Problem conclusion

  • The problem has been fixed so that it no longer occurs.
    

Temporary fix

  • A fix for this problem is currently targeted for 6.3.2.3 and
    7.1.1.4 interim fix package. Until this interim fix is actually
    available this information is subject to change at the
    discretion of IBM.
    

Comments

APAR Information

  • APAR number

    IT05420

  • Reported component name

    TSM CLIENT

  • Reported component ID

    5698ISMCL

  • Reported release

    64L

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-11-07

  • Closed date

    2015-01-19

  • Last modified date

    2015-11-10

  • 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

  • R63A PSY

       UP

  • R63H PSY

       UP

  • R63L PSY

       UP

  • R63M PSY

       UP

  • R63S PSY

       UP

  • R63W PSY

       UP

  • R64A PSY

       UP

  • R64H PSY

       UP

  • R64L PSY

       UP

  • R64M PSY

       UP

  • R64S PSY

       UP

  • R64W PSY

       UP

  • R71A PSY

       UP

  • R71H PSY

       UP

  • R71L PSY

       UP

  • R71M PSY

       UP

  • R71S PSY

       UP

  • R71W PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 64L

Reference #: IT05420

Modified date: 10 November 2015