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Answer Posted / sd
IMS programs can be run two ways: under IMS’s control, as a
BMP, or as a stand-alone batch job, known as DLI.
BMP jobs have these features:
Run in conjunction with an IMS control region, an MVS
started task that controls all online and BMP programs
Require no DD statements for the databases; the IMS control
region contains the knowledge of the databases.
Require an ACB gen to process.
Require the IMS DBDLIB in the JCL ONLY when GSAM databases
are being used
Does not require the allocation of a log dataset, as there
is one log dataset of all of IMS
BMP jobs must run on the machine which is processing the
IMS control region. This is controlled by job class. Most
installations have specific job classes for BMP jobs.
DLI jobs have these features:
Run as stand-alone jobs with no communication or knowledge
of the online IMS system
Require DD statements for all databases
Can be run with an ACB, or with the DBD and PSB (IMS will
dynamically create the ACB at execution time)
Require the DBDLIB or ACBLIB DD statement
Require the allocation of a log dataset if recovery is to
be performed
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