PI25747: DB2 NEW FUNCTION

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• DB2 new function
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 users with PPRC enabled DASD         *
  *                 subsystems.                                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: Provide support for zHyperWrite for     *
  *                      active log data sets.                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  This APAR provides support for using zHyperWrite with DB2
  active log data sets.  A new ZPARM, REMOTE_COPY_SW_ACCEL
  enables or disables the use of zHyperWrite.  The default
  is disabled.  Enabling the function may improve active log
  write performance if the active log data sets reside on PPRC
  volumes.  Improved active log write performance may result in
  improved response time for DB2 operations that must ensure the
  log records have been externalized before continuing.  When
  zHyperWrite is enabled, increased SRB time in the xxxxMSTR
  address space may be observed.
  
  MSGDSNJ370I is updated to indicate the status of zHyperWrite
  usage for the active log data sets.  The following line is
  added to the output of the -DISPLAY LOG command:
  
  SOFTWARE ACCELERATION IS <accel-status>
  
  where <accel-status> is either ENABLED or DISABLED.
  
  The PTFs for the following APARs are required for DB2 to use
  zHyperWrite.  If the PTFs are not installed, the request to
  use zHyperWrite will be ignored and the I/O will be processed
  as though zHyperWrite was not requested.
  
  DFSMS APARs:
  OA41906
  OA43661
  OA43662
  OA43663
  OA44973
  OA45125
  
  z/OS APARs:
  OA43453
  OA44240
  OA45662
  
  zHyperWrite D/TDS8870  D/T8870
  

Problem conclusion

Temporary fix

Comments

• There is no negative effect if zHyperWrite is requested and
  the active log data sets are not on PPRC enabled volumes.
  

APAR Information

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

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

  UI24111 UI24112

Modules/Macros

•    DSN@XAZP DSNDQWPZ DSNFCDIR DSNFJDIR DSNFMDIR
  DSNJCHGZ DSNJC00A DSNJDS02 DSNJDS03 DSNJS001 DSNJW009 DSNJW107
  DSNJW127 DSNTIDXA DSNTIDXB DSNTIJUZ DSNTINST DSNTXAZP DSNWZIFA
  DSNWZIFB DSN6LOGP
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UI24111

     UP15/01/18 P F501

• RB10 PSY UI24112

     UP15/01/18 P F501

Fix is available

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