PK04737: PERFORMANCE IMPROVEMENT OF HPFP REORGANIZATION FOR UNLOAD PROCESS WHICH NEEDS MULTIPLE OUTPUT TASKS

APAR status

• Closed as unreproducible in next release.

Error description

• Even though UNLOAD process writes multiple output files
  under multiple sub-tasks, these sub-task processes are
  serialized. It is improved to run these multiple sub-tasks
  concurrently.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of High Performance Fast Path      *
  *                 Reorganization Tool Version 2 Release 1.     *
  *                 (FMID: H31A210)                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Even though UNLOAD process writes       *
  *                      multiple output files under multiple    *
  *                      sub-tasks, these sub-task processes are *
  *                      serialized. It is improved to run these *
  *                      multiple sub-tasks concurrently.        *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  When HPFP UNLOAD process with SORT=YES writes multiple output
  files under multiple sub-tasks, these sub-task processes are
  serialized. Because FTT is used for AWE which tells the input
  end of sorting, therefore when there are two or more sorting
  tasks, it need to wait for completing the input of the sorting
  task to reuse the FTT for another sorting tasks. Even when
  there are two or more sort-tasks, the processes are serialized.
  

Problem conclusion

Temporary fix

Comments

• The module HFPFTRM0 has been modified so that SR buffer may be
  used for AWE which tells the input end of sorting.
  As one SR buffer is obtained temporarily for each sorting task,
  it became unnecessary to wait for the input end of the sorting
  task. Then HPFP UNLOAD with SORT=YES can run multiple sub-tasks
  concurrently.
  

APAR Information

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

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

  UK02924

Modules/Macros

•    HFPFTRM0 HFPJIUS0 HFPJOMN0
  

Fix information

• Fixed component name

  IMS HP FP UTILI

• Fixed component ID

  5655K9400

Applicable component levels

• R210 PSY UK02924

     UP05/05/10 P F505