PH23440: CLEARCASE INFORMATION CENTER INCORRECTLY STATES THAT MVFS SCALING FACTOR IS AUTOMATICALLY SET FOR ALL PLATFORMS

Rational ClearCase Fix Pack 2 (9.0.2.2) for 9.0.2
Rational ClearCase Fix Pack 10 (9.0.1.10) for 9.0.1
Rational ClearCase Fix Pack 3 (9.0.2.3) for 9.0.2
Rational ClearCase Fix Pack 11 (9.0.1.11) for 9.0.1

APAR status

• Closed as program error.

Error description

• The "Adjusting the MVFS scaling factor" page at
  https://www.ibm.com/support/knowledgecenter/SSSH27_9.0.1/com.ibm
  .rational.clearcase.cc_admin.doc/topics/t_perf_clnt_scale_factor
  .htm incorrectly states:
  
  "The default MVFS scaling factor is automatically set based on
  the available physical memory installed on the host."
  
  This statement is incorrect. A more correct statement would be:
  "For Unix/Linux hosts, the default MVFS scaling factor is
  automatically set based on the available physical memory
  installed on the host. For Windows host, the scaling factor is
  set at the time of installation and does not change unless
  manually adjusted."
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of ClearCase dynamic views on Microsoft Windows        *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * As stated in the ClearCase documentation, the default MVFS   *
  * scaling factor is automatically set based on the available   *
  * physical memory installed on the host. On Microsoft Windows, *
  * two distinct problems were inhibiting this heuristic         *
  * algorithm from functioning properly.  The allowable values   *
  * for this tunable parameter are 0-5.  An error in the         *
  * calculation was causing this range to be truncated to 0-2.   *
  * There was also a defect in the ClearCase Control Panel       *
  * application which prevented the actual value that is in use  *
  * from being displayed, unless the default had been explicitly *
  * overridden when installing ClearCase.  Unless it was changed *
  * during the installation, the Control Panel always showed 1   *
  * as the scaling factor value.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• These problems are fixed in ClearCase 9.0.1.10 and 9.0.2.2.   If
  the default value is not overridden during installation, the
  MVFS scaling factor on a Windows system will be correctly
  calculated in the range 0-5, and the ClearCase Control Panel
  application will correctly display the calculated value.
  

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 WIN

• Fixed component ID

  5724G2900

Applicable component levels

• R901 PSY

     UP

• R902 PSY

     UP