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PM13994: MVFS view-extended ClearCase operations incur greater than 50 pe rcent overhead than setview operations on AIX

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APAR status

  • Closed as program error.

Error description

  • MVFS view-extended ClearCase operations incur greater than 50
    percent overhead than setview operations on AIX
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    In ClearCase running on AIX, when there are a large number
    of VOBs mounted (e.g., hundreds in some customer cases) and
    the user is cd'd into a view-extended directory pathname and
    uses the getwd() call to find the current directory pathname
    (e.g., the /bin/pwd command), they may experience a long
    delay (many seconds) before getting the current directory
    pathname (e.g., seeing the pathname from /bin/pwd).
    

Problem conclusion

  • This is fixed by a combination of ClearCase 7.1.2.9 or
    8.0.0.5, together with an AIX kernel patch. These patches be
    installed independently, but the performance improvement
    won't be seen until both changes are installed.  The AIX
    kernel APARs containing the AIX changes are:
    
        IV22023 (for AIX 5.3 TL12)
        IV31361 (will be AIX 6.1 TL8)
        IV31359 (will be AIX 7.1 TL2)
        IV31750 (will be AIX 6.1 TL9)
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM13994

  • Reported component name

    CLEARCASE UNIX

  • Reported component ID

    5724G2901

  • Reported release

    711

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-05-07

  • Closed date

    2012-12-15

  • Last modified date

    2012-12-15

  • 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

    CLEARCASE UNIX

  • Fixed component ID

    5724G2901

Applicable component levels

  • R711 PSN

       UP



Document information

More support for: Rational ClearCase

Software version: 7.1.1

Reference #: PM13994

Modified date: 15 December 2012