Recovery Parameters vs. Auto Journalling
Is there any difference between the 'RECOVERY PARAMETERS' and 'AUTO JOURNALLING' of the CICS FCT? Is there any consideration before choosing which to use for VSAM Forward Recovery purpose?
YES. Some of the AUTO JOURNALLING parameters (specifically JNLadd = Before or ALL) can cause problems because Before and All journal records are written Before the VSAM I/O. This causes CICS WRITEs to be journaled even when the DUPREC condition is raised, producing FRS duplicate record errors (R15=8,FDBK=8).
RECOVERY PARAMETERS are recommended over AUTO JOURNALLING parameters (in CICS TS).