PM51297: IMS DEDB FAST RECOVERY ENHANCEMENT IN SUPPORT OF IMS V10 APAR PM40155 AND IMS V11 APAR PM48847

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• IMS DEDB Fast Recovery enhancement in support of the following
  IMS APARs:
  - IMS V10: PM40155 (PTF is UK72970)
  - IMS V11: PM48847 (PTF is UK72971)
  These were various DFSFDLW0 problems that needed to be
  addressed.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS DEDB FAST RECOVERY Version 2         *
  *                 Release 2 (FMID=H1J2220) users in IMS V10    *
  *                 or V11.                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: This APAR is DFR version for IMS V10    *
  *                      APAR PM40155 (PTF is UK72970) and IMS   *
  *                      V11 APAR PM48847 (PTF is UK72971).      *
  *                      - PM40155 and PM48847                   *
  *                      DFSFDLW0 is passed a 2 byte field from  *
  *                      DFSULG20 to indicate primary and secon- *
  *                      dary WADS. If DFSWADS1 is specified in  *
  *                      the JCL but DFSWADS0 is not, the first  *
  *                      byte of the field is X'00'.             *
  *                      DFSFDLW0 checks the first byte, and if  *
  *                      it is X'00', assumes no WADS available  *
  *                      and doesn't bother checking the second  *
  *                      bytes, which may not be X'00' if        *
  *                      DFSWADS1 was specified. This results in *
  *                      WADS read processing being skipped as   *
  *                      NOWADS.                                 *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  - PM51297 for IMS DEDB Fast Recovery
  DFRGCLSA/B sets a value taken from the last X'4800' log record
  as a value of RLGWMAT field in the parameter list (RLWPSUFX)
  passed to DFRFDLWA/B and reflects the WADSs allocation status to
  WADSID in RLGWMAT field.
  If a secondary WADS is allocated but a primary WADS is not in
  a dual WADS environment, the first byte of WADSID in RLGWMAT
  field is X'00'.
  DFRFDLWA/B checks the first byte of WADSID, and if it is X'00',
  assumes no WADS available and doesn't bother checking the second
  byte.
  This results in WADS read processing being skipped as NOWADS and
  DFR may lose the committed log records in WADS.
  

Problem conclusion

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

• The following modules have been modified.
  (x = A and B)
  *
  DFRFDLWx - This module was changed so that a second check that
             runs if the first byte in WADSID is X'00' might be
             added.
             WADS read processing is then only skipped as NOWADS
             if both bytes are X'00'.
  *
  

APAR Information

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

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

  UK73560

Modules/Macros

• DFRFDLWA DFRFDLWB
  

Fix information

• Fixed component name

  DEDB FAST RECOV

• Fixed component ID

  5655E3200

Applicable component levels

• R220 PSY UK73560

     UP11/11/06 P F111

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.