PM37988: REDUCTION IN DATA SPACE USAGE OF HPFPU FPA

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• This APAR enables the FPA to process with less data space when
  ICACHE=YES is specified and the FPA ANALYZE function to improve
  the performance.
  This enhancement is being implemented as a result of FITS
  requirement MR1224106453.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of HPFPU FPA in Fast Path          *
  *                 Solution Pack Version 1 Release 1            *
  *                 (FMID: HAHQ110).                             *
  ****************************************************************
  * PROBLEM DESCRIPTION: This APAR provides enhancement to       *
  *                      increase the system performance for FPA *
  *                      Analyze and to reduce Data Space usage  *
  *                      when ICACHE=YES is specified.           *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  1. New internal process in FPA Analyze  which reads data from
     ADS/IC dataset to internal buffer is drastically changed to
     increase its performance and no longer needs Data Space.
  2. The total size of Data Space obtained during all FPA process
     with ICACHE=YES is reduced to the only total size of Base*,
     IOVF, and SDEP part needed.
     *Base size is required only when input is IC format.
  3. FPA process is able to take two data spaces for RAA + DOVF
     part to accept more than 2GB data when input is IC format.
  4. Subtext for V3053 is  added on purpose to get attention
     when the error was resulted from IEFUSI exit limitation.
  
  This enhancement is being implemented as a result of FITS
  requirement MR1224106453.
  

Problem conclusion

Temporary fix

Comments

• ========================
  = DOCUMENTATION CHANGE =
  ========================
  The IMS Fast Path Solution Pack for z/OS Version 1 Release 1
  IMS High Performance Fast Path Utilities User's Guide
  (SC19-2914-01).
  
  2.10.4.37 ICACHE
  
  The description at NOTE is modified as follows:
  
  | Note: The number of data spaces that are created by FPA is
  | calculated by the following steps:
  
    1. | Calculate the size of Base, IOVF, and SDEP part for each
       | input thread subtask. Base is required when input is IC
       | format.
  
    2. | Arrange Base, IOVF, and SDEP part to put together if
       | possible.  Base is required when input is IC format.
  
            * | When the total size is less than 2GB, FPA requires
              | only one data space. FPA requires two data spaces
              | otherwise.
  
  2.10.4.39 ICINCOMP
  
  The description about data space usage for FPA is modified
  as follows:
  
  | FPA stores all image copy records into a data space storage
  | when an image copy is used as an input data set.
  | Because the maximum size of one data space that is created by
  | FPA is 2 GB, if the total size of the records for the Base par
  | the IOVF part or the SDEP part exceeds the limit, FPA obtains
  | another data space storage and stores the records. When
  | ICINCOMP=YES is specified, the records are compressed and the
  | total size of the records is reduced.
  
  2.11.3 Processing report
  
  The following description are added after
  "PROCESSING INFORMATION" explanation.
  
  '- IOVF/SDEP WAS NOT PRELOADED INTO A DATA SPACE FOR PROCESSING.
  AREA NO: nnnn, AREANAME: areaname' is printed when FPA Analyze
  Because FPA Analyze no longer requires Data Space.
  FPA Reload/Change/Reorg with PTRCHKLVL=FULL option prints the
  same message due to these options initiate FPA Analyze internall
  
  7.1.3 Messages
  
  New message subtext is added to HFPV0004I and HFPV3053E.
  The message text of the current HFPV3067E is changed.
  ×**** PE11/09/07 PTF IN ERROR. SEE APAR PM47335  FOR DESCRIPTION
  

APAR Information

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

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

  UK69341

Modules/Macros

• HAHQ110J HFPAMAN0 HFPA1DC0 HFPA1II0 HFPA1IN0
  HFPA1IO0 HFPA1I10 HFPA1P10 HFPA1P20 HFPA1RP0 HFPA3GD0 HFPA3MN0
  HFPA30WK HFPFMAN0 HFPLOPT0 HFPMDCB0 HFPQADO0 HFPQA1I0 HFPRAWE
  HFPRDSPS HFPRDSP0 HFPREST0 HFPRMAN0 HFPRTDG0 HFPRTDO0 HFPRTGD0
  HFPUMVT0 HFPVBFG0 HFPVBRD0 HFPVCAL0 HFPVDRD0 HFPVICG0 HFPVICI0
  HFPVICM0 HFPVICS0 HFPVINI0 HFPVIO   HFPVIOM0 HFPVMMA0 HFPVMMC0
  HFPVOPN0 HFPVTRM0 HFPWMTV0 HFPZACC  HFPZACT  HFPZDCB  HFPZMVT
  

Fix information

• Fixed component name

  IMS FP SOLUTION

• Fixed component ID

  5655W1400

Applicable component levels

• R110 PSY UK69341

     UP11/07/02 P F107

Fix is available

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