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

Rational ClearCase Fix Pack 09 (7.1.2.9) for 7.1.2
Rational ClearCase Fix Pack 05 (8.0.0.5) 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

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

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
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  * PROBLEM DESCRIPTION:                                         *
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  * RECOMMENDATION:                                              *
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  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 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

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