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PM52732: MODIFYING THE MVFS_CTXT_ATIME_REFRESH WITHIN MVFS_TUNABLES.C AND REBUILDING THE MVFS WILL NOT CHANGE THE 3600 SECOND VALUE

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APAR status

  • Closed as program error.

Error description

  • Modifying the mvfs_ctxt_atime_refresh within mvfs_tunables.c and
    rebuilding the MVFS will not change the 3600 second value
    
    
    ClearCase 7.1.2.4, 7.1.2.x
    
    
    RedHat 5 Update 3 and above
       2.6.18-128 SMP x86_64
       2.6.18-194.11.1 SMP x86_64
    
    
    To Reproduce:
    
    From a VOB server, make a test VOB on Network Attached Storage.
    Mount the VOB, set to a View and cd into the VOB and make a new
    element:  The element can be an executable script or a C program
    file and should use any type manager other than whole copy.
    Once the element has been created, please check in the element.
    Verify that the checked in element version is within the
    cleartext pool of the VOB:  /usr/atria/etc/mvfsstorage ?element?
    
    
    
    Now, from a Client system remote to the VOB server and accessing
    the Network Attached Storage and was not apart of making the
    element:
    
    1)  On a remote client, as root cd into
    /var/adm/atria/mvfs/mvfs_src
    
    2)  make clean
    
    3)  vi mvfs_tunables.c
    
    4)  Modify the following line:
    
    From:
       int mvfs_ctxt_atime_refresh = 3600;
    
    To:
       int mvfs_ctxt_atime_refresh = 10;
    
    
    5)  make
    
    6)  make install
    
    7)  /usr/atria/etc/clearcase stop
    
    8)  /usr/atria/clearcase start
    
    9)  Now, as a non-root user, mount the test VOB and set to a
    View
    
    10)  Issue ?/usr/bin/stat ?element?? and note the values
    
    11)  cat the element
    
    12)  Issue ?/usr/bin/stat ?element?? and note that the atime
    changed
    
    13)  Wait 2 minutes:  Now, cat the element again
    
    14)  Issue ?/usr/bin/stat ?element?? and verify that the atime
    has not changed
    
    15)  Now, wait 15, 30, 45 minutes more (15 minute intervals) and
    cat the element again:  ?/usr/bin/stat ?element?? does not show
    an atime change.
    
    16)  After one hour has elapsed, cat the element again.   Issue
    ?/usr/bin/stat ?element?? and now the atime changed
    
    
    Workaround:  None
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Modifying the mvfs_ctxt_atime_refresh within mvfs_tunables.c
    and rebuilding the MVFS will not change the value.
    

Problem conclusion

  • A fix is available in ClearCase versions 7.1.2.8 and 8.0.0.4
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM52732

  • Reported component name

    CLRCASE MSITE W

  • Reported component ID

    5724G3200

  • Reported release

    712

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-11-21

  • Closed date

    2012-09-26

  • Last modified date

    2012-09-26

  • 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

    CLRCASE MSITE W

  • Fixed component ID

    5724G3200

Applicable component levels

  • R712 PSN

       UP

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Document Information

Modified date:
26 September 2012