IC69514: MDVREGR: CORRECTION OF A MISMATCH IN PERFORMANCE DATA BETWEEN TPC AND BROCADE WEBTOOLS

4.2.1 Interim Fix 1 (November 2011) for Tivoli Storage Productivity Center

APAR status

• Closed as program error.

Error description

• This APAR needs to implement a workaround for an external
  Brocade Defect "DEFECT000304478" that will cause a mismatch
  between the performance data displayed in TPC and the
  Brocade Element Manager or SAN Health.
  In TPC initially the code worked correctly, but then we changed
  it so that it would match the output of what Brocade calls the
  "webtools" performance.
  Now that it has been determined that this output is incorrect,
  it means the TPC code is also incorrect.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: TPC 4.1.1 users monitoring switch            *
  *                 performance                                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: Switch performance metrics reported by  *
  *                      TPC not as expected when compared to    *
  *                      performance metrics reported by         *
  *                      Brocade applications, such as WebTools  *
  *                      and SAN Health.                         *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  *                                                              *
  ****************************************************************
  8b/10b encoding is not taken into account in webtools
  performance data while it is with SAN Health.  Brocade has
  created DEFECT000304478 for this issue.
  

Problem conclusion

• TPC was incorrectly adjusted in 4.1.1 to match the encoding
  used by Brocade's WebTools application.  However, that has
  now been determined to be incorrect and does not match with
  Brocade's SAN Health application.  Brocade DEFECT000304478
  has been opened to correct that.  Meanwhile, TPC needs to be
  corrected to use the correct encoding with the performance
  metrics it reports.  The fix for this APAR is targeted for
  the following maintenance packages:
  
  | fix pack | 4.1.1-TIV-TPC-FP0005 - target October 2010
  
  http://www-01.ibm.com/support/docview.wss?&uid=swg21320822
  
  The target dates for future fix packs do not represent a formal
  commitment by IBM. The dates are subject to change without
  notice.
  
   | <MDVREGR 4.1.1-TIV-TPC-GA |     4.1.1.55
   | <MDVREGR 4.1.1-TIV-TPC-FP0001 | 4.1.1.66
   | <MDVREGR 4.1.1-TIV-TPC-FP0002 | 4.1.1.74
   | <MDVREGR 4.1.1-TIV-TPC-FP0003 | 4.1.1.84
   | <MDVREGR 4.1.1-TIV-TPC-IF0001 | 4.1.1.85
  
  Even with the TPC change, the Brocade discrepancy will still
  be apparent when comparing values between their WebTools and
  SAN Health applications, until they resolve that.
  

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

  TPC FOR FABRIC

• Fixed component ID

  5608TC100

Applicable component levels

• R41A PSY

     UP

• R41L PSY

     UP

• R41W PSY

     UP