FALLBACK keyword

The FALLBACK keyword internally switches the batch image copy process to the concurrent image copy process when exclusive authorization of the input database is not granted during the batch image copy process.

This keyword is effective for the Image Copy function when the requested process is batch image copy and the process runs with DBRC=Y.

Functions that support this keyword
Image Copy function
Statements that support this keyword
GLOBAL statement
Site default option
Supported
Related keywords
Format
Read syntax diagramSkip visual syntax diagramFALLBACK=NY
Y
Switches the batch image copy process to the concurrent image copy process when exclusive authorization of the input database is not granted during the batch image copy process.
N
Does not switch image copy processes.
Default value
FALLBACK=N
Usage notes
  • Even when FALLBACK=Y is specified, the process is not switched to the concurrent image copy process when one of the following conditions applies to the input database:
    • The database is not registered to the DBRC RECON data sets.
    • The database is a non-recoverable database.
    • The data set organization type is VSAM KSDS and FASTIC=(,COPY) or FASTIC=(,FDUMP) processing of Advance Image Copy Services is requested.
    • When FASTIC=(,DUMP) processing of Advance Image Copy Services is requested and the data set organization type is VSAM KSDS that does not satisfy both of the following conditions:
      • The data set is an SMS-managed data set
      • The BWO(TYPEIMS) parameter is not specified for the AMS DEFINE or the ALTER command for the data set
  • FALLBACK=Y is not effective under the following conditions:
    • DBRC=N is specified.
    • The requested process is concurrent image copy.
    • The data set organization type is VSAM KSDS and the process runs with CIC_KSDS=N and FASTIC=N.
    • The input database is an index database and BYPDBAUTH=Y is specified.
  • If FALLBACK=N and exclusive authorization is not granted during the batch image copy process, the IMS HP Image Copy job behaves as follows:
    • For full-function databases and HALDBs, IMS HP Image Copy ends abnormally.
    • For Fast Path databases, IMS HP Image Copy skips the area and continues with the next area. The job-step return code is set to 8.