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

Rational ClearCase Fix Pack 08 (7.1.2.8) for 7.1.2
Rational ClearCase Fix Pack 04 (8.0.0.4) for 8.0
Rational ClearCase Fix Pack 14 (7.1.2.14) for 7.1.2
Rational ClearCase Fix Pack 11 (8.0.0.11) for 8.0
Rational ClearCase Fix Pack 12 (8.0.0.12) for 8.0
Rational ClearCase Fix Pack 15 (7.1.2.15) for 7.1.2
Rational ClearCase Fix Pack 13 (8.0.0.13) for 8.0
Rational ClearCase Fix Pack 16 (7.1.2.16) for 7.1.2
Rational ClearCase Fix Pack 17 (7.1.2.17) for 7.1.2
Rational ClearCase Fix Pack 14 (8.0.0.14) for 8.0
Rational ClearCase Fix Pack 18 (7.1.2.18) for 7.1.2
Rational ClearCase Fix Pack 15 (8.0.0.15) for 8.0
Rational ClearCase Fix Pack 19 (7.1.2.19) for 7.1.2
Rational ClearCase Fix Pack 16 (8.0.0.16) for 8.0
Rational ClearCase Fix Pack 17 (8.0.0.17) for 8.0
Rational ClearCase Fix Pack 18 (8.0.0.18) for 8.0
Rational ClearCase Fix Pack 19 (8.0.0.19) for 8.0
Rational ClearCase Fix Pack 20 (8.0.0.20) for 8.0
Rational ClearCase Fix Pack 21 (8.0.0.21) for 8.0

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 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

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