IBM DS8880 Thin Provisioning

An IBM Redpaper publication

Published 24 August 2016, updated 16 May 2017

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ISBN-10: 0738455520
ISBN-13: 9780738455525
IBM Form #: REDP-5343-00
(76 pages)

Authors: Bert Dufrasne, Andre Coelho, Peter Kimmel, Roland Wolf


Ever-increasing storage demands have a negative effect on an organization’s IT budget and complicate the overall storage infrastructure and management. Companies are looking at ways to use their storage resources more efficiently.

Thin provisioning can help by reducing the amount of unused storage that is typically allocated to applications or users. Now available for the IBM® DS8880 for Fixed Block (FB) and Count Key Data (CKD) volumes, thin provisioning defers the allocation of actual space on the storage system until the time that the data must effectively be written to disk.

This IBM Redpaper™ publication provides an overall understanding of how thin provisioning works on the IBM DS8880. It provides insights into the functional design and its implementation on the IBM DS8880 and contains illustrations for the configuration of thin-provisioned volumes from either the DS GUI or the DS CLI.

This edition reflects the capability to define extent space-efficient (ESE) volumes from pools with large or small extents, which was introduced with the IBM DS8880 Release 8.1 firmware.

Dec 2016 - Document amended to include the z/OS space-release function, supported with DS8880 Release 8.2

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Table of contents

Chapter 1. Thin provisioning
Chapter 2. Planning considerations and guidelines
Chapter 3. Space-efficient volumes in the DS8880
Chapter 4. DS GUI and DS CLI support for thin provisioning
Chapter 5. Managing and monitoring thin-provisioned volumes
Chapter 6. Use of thin-provisioned volumes in z/OS

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