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New Ways of Running Batch Applications on z/OS: Volume 1 CICS Transaction Server by Elsie Ramos, Alex Louwe Kooijmans, Daniel Millwood

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Application design considerations
In this chapter, we highlight some of the key application design considerations when building a batch application to run in CICS.
4.1 When to use Batch Data Streams to read input to a batch job
The use of a Batch Data Stream makes sense in the following circumstances:
The batch job is processing lots of records and needs to exploit checkpoint/restart.
You want to maintain a logical physical indirection to an input/output source.
You allow the application to open something, for example, for input/output based ...

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