DFSMS: From Storage Tears to Storage Tiers

An IBM Redpaper publication

Published 06 June 2016

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ISBN-10: 0738455377
ISBN-13: 9780738455372
IBM Form #: REDP-5341-00
(18 pages)

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Authors: Keith Winnard, Jose Gilberto Biondo Jr, Glenn Wilcock


This IBM® Redpaper™ publication describes how class transitions differ from the classic migration processes and how they can influence application performance levels.
Performance is focused on the following goals:

  • Reduce the number of I/Os required to manage the storage
  • Optimize data locations to the appropriate device type during its lifecycle

This paper applies to the IBM z/OS® V2.2 level.

Table of contents

Understanding the challenges
Classic migration and recall versus class transition
Implementing and using class transition

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