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IT17186: PROTECT STORAGEPOOL SLOW AFTER CANCELLATION OF A PREVIOUS PROTECT PROCESS

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APAR status

  • Closed as program error.

Error description

  • If you cancel an IBM Spectrum Protect PROTECT STGPOOL command,
    the next invocation automatically runs a PROTECT with the
    FORCERECONCILE option.
    
    This is disadvantageous for two reasons:
    1) A forcereconcile is an exhaustive search of the
    SD_REPLICATED_CHUNKS tables on both servers. The source server
    will, one by one, request from the target all of the chunks and
    compare them with all of its chunks. If the target has chunks
    the source does not know about, they are deleted. If the source
    has chunks the target does not know about, they will be sent
    over later.
    2) Forcereconcile is single threaded for queries.
    
    This can result in unexpected performance impact on the PROTECT
    command.
    
      Tivoli Storage Manager Versions Affected: 7.1.3 and newer
      Initial Impact: Medium
      Additional Keywords: TSM
    

Local fix

  • regularly allow PROTECT STGPOOL to complete and avoid
    cancellation of protect processes
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All Tivoli Storage Manager server users of                   *
    * directory-container pools and PROTECT STGPOOL to replication *
    * target servers.                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See error description.                                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is projected *
    * to be fixed in levels 7.1.7.100 and 7.1.8. Note that this is *
    * subject to change at the discretion of IBM.                  *
    ****************************************************************
    

Problem conclusion

  • The problem was fixed.
    Affected platforms: AIX, Solaris, Linux, and Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT17186

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    71W

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-09-23

  • Closed date

    2016-12-01

  • Last modified date

    2016-12-07

  • 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 SERVER

  • Fixed component ID

    5698ISMSV

Applicable component levels

  • R71W PSY

       UP

  • R71A PSY

       UP

  • R71L PSY

       UP

  • R71S PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 7.1.3

Reference #: IT17186

Modified date: 07 December 2016