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DFSMS: From Storage Tears to Storage Tiers

An IBM Redpaper publication


Published on 06 June 2016

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ISBN-10: 0738455377
ISBN-13: 9780738455372
IBM Form #: REDP-5341-00

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

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    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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