OA41906: NEW FUNCTION: DEVICE SUPPORT FOR HYPERPAV ALIAS TUNING

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• NEW FUNCTION: Device Support for HyperPAV Alias Tuning
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of z/OS Global Mirror (XRC) workload   *
  *                 based write pacing for D/T2107               *
  *                 storage subsystems.                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: New Function: HyperPAV aliases can be   *
  *                      unnecessarily consumed when write       *
  *                      pacing is employed in XRC               *
  *                      environments. Support is added to       *
  *                      detect when pacing at certain levels    *
  *                      is being done, allowing for write I/Os  *
  *                      that will be paced on the D/T2107       *
  *                      storage subsystems.                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  In z/OS Global Mirror (XRC) workload-based write pacing
  environments where HyperPAV technology is used on D/T2107
  storage subsystems, a new workload importance-based scheme for
  injecting write pacing delays is used.  HyperPAV alias
  management is enhanced to recognize when significant delays are
  injected, and  based on I/O importance will pace alias usage
  such that fewer aliases will be consumed by lesser importance
  I/Os that would otherwise be paced.
  

Problem conclusion

Temporary fix

Comments

• This PTF is in support of the new workload importance-based
  scheme for z/OS Global Mirror (XRC) workload-base environments
  where HyperPAV technology is used on the D/T2107 storage
  subsystem.
  
  To enable this support for this enhancement you must install
  the appropriate PTFs for APAR OA43453 and OA44004.
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

  OA41872

• APAR is sysrouted TO one or more of the following:

  OA43455 OA43469 UA75721 UA75722

Modules/Macros

• IECDINIT IECDPRFX IGGSNS01
  

Fix information

• Fixed component name

  DEVICE SUPPORT

• Fixed component ID

  5695DF111

Applicable component levels

• RD10 PSY UA75721

     UP15/01/09 P F501

• R210 PSY UA75722

     UP15/01/09 P F501

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.