Uncovering Seams in a Mainframe's external interfaces

Alessio Ferri and Tom Coggrave start detailing the seams they explored with two areas of external interfaces. Batch input of files are copied to new implementations while comparing the output of the processing pipelines. API access points can be covered with a proxy and traffic gradually directed to the new implementation.

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from Martin Fowler https://ift.tt/biQjCr2