If CICS® is to register as a generic resource member, the GRNAME system initialization parameter must be specified.
If GRNAME is specified CICS attempts to register immediately after the ACB is open by issuing the VTAM® SETLOGON OPTCD=GNAMEADD command.
If registration succeeds, CICS is then a member of the generic resource specified by the SIT GRNAME parameter and may be addressed either by its generic resource name or (subject to certain restrictions) by its unique applid. Use of the generic resource name allows VTAM to balance the workload by selecting whichever generic resource member is most lightly loaded.
If registration fails, CICS initialization continues but CICS will not be a generic resource member.
The registration status may be examined by means of the CEMT INQUIRE VTAM command.
CICS de-registers as a generic resource by means of the VTAM SETLOGON OPTCD=GNAMEDEL command immediately before the ACB is closed.
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