Changes to the RECON data set

Certain records in the RECON data set are new or changed from the records in IMS Version 13 and IMS 14.

Changes introduced in IMS 15

In IMS 15, the following RECON records have changed fields:

  • DSPRCNRC:
    • The RCNDATA flag within the RCNFIXED field is changed to indicate the new RECON header name.
    • The RCNMVERS flag within the RCNFIXED field is changed to indicate the current minimum version number during upgrade. The version number cannot be earlier than 13.1 (X'D1').
  • DSPRCR1: The RCR1LVL flag within the RCR1VERS field is changed to indicate the RECON header extension record.
  • DSPLOGRC: The LOGRELVL flag within the LOGFIXED field is changed to indicate the log release level, which is 15.1 in IMS 15 for all log record types.
  • DSPOLDRC: The OLDRELVL flag within the OLDDENT(*) field is changed to indicate the OLDS release level, which is 15.1 in IMS 15 for all OLDS record types.
  • DSPSSRC:
    • The SSRELLVL flag within the SSFIXED field is changed to indicate the subsystem release level, which is 15.1 (X'E1') in IMS 15.
    • The SSCOEXLV flag within the SSFIXED field is changed to indicate the subsystem coexistence level, which is 15.1 (X'E1') in IMS 15.

Changes introduced in IMS 14

In IMS 14, the following RECON records have changed fields:

  • DSPDBHRC: New flag DBOSAM8G within the DMBFlags field is added to indicate that a HALDB database supports 8-GB OSAM database data sets.
  • DSPPTNRC: New flag PTNOSAM8G within the PTNFlags field is added to indicate that within each HALDB partition the maximum capacity of each OSAM PHDAM and PHIDAM data set is 8 GB.
  • DSPRCNRC: New field RCNCATLG is used to indicate the IMS catalog if one is being used.