IBM OS/390 User Manual

Preface

The purpose of this document is to provide information and guidance to
personnel involved in a VSE to OS/390 operating system change; that is, a VSE
to OS/390 migration.

The primary focus is on VSE program and file conversions, and on operational
differences between the two systems. Chapters on each of the source languages
are included. DB/DC conversions, and operational differences between POWER
and JES2 are also addressed.

Within each chapter, not only are the differences pointed out, but OS/390
implementation and suggested use recommendations are made wherever
possible. These recommendations can help the migrating customer

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better

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design their use of OS/390.

Throughout this document, the term MIGRATION refers to the entire process of
transition from a VSE environment to an OS/390 environment. The term
CONVERSION describes the process of translating and updating VSE applications
and data to meet the requirements of OS/390.

The Team That Wrote This Redbook

This redbook was produced by a team of specialists from around the world
working with the International Technical Support Organization Poughkeepsie
Center.

Our thanks to Judith Jay for bringing a renewed focus to the issues, concerns
and effort required to migrate from VSE to OS/390.

Redbook Builders and Key Contributors

Cliff Bays IBM, Endicott
Bimshire Davis IBM, Chicago
Don Durand IBM, Poughkeepsie
Dan Ebaugh IBM, Gaithersburg
Patrick Fournier Managing Partner, Automated Migration Services, Walnut
Creek, CA
Dave Greenough IBM, Vermont
John Hutchinson IBM, Gaithersburg
Dan Janda IBM, Endicott
Judith Jay IBM, White Plains
Kevin Jones IBM, Endicott
Herbert Kratzer IBM, Germany
Tom Plunkett Senior Director of Systems Engineering, Automatic Data
Processing, Inc., Roseland, NJ
Gilbert Saint-flour Technical Manager, Automated Migration Services,
Livingston, NJ
John Sutera IBM, Endicott
Guenter Weigelt IBM, Germany

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