ISO_IEC_24091_2019.pdf

Information technology Power efficiency measurement specification for data center storageINTERNATIONAL STANDARDISO/IEC24091Reference numberISO/IEC 24091:2019(E)First edition2019-11 ISO/IEC 2019 ISO/IEC 24091:2019(E)ii ISO/IEC 2019 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO/IEC 2019All rights reserved.Unless otherwise specified,or required in the context of its implementation,no part of this publication may be reproduced or utilized otherwise in any form or by any means,electronic or mechanical,including photocopying,or posting on the internet or an intranet,without prior written permission.Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCP 401 Ch.de Blandonnet 8CH-1214 Vernier,GenevaPhone:+41 22 749 01 11Fax:+41 22 749 09 47Email:copyrightiso.orgWebsite:www.iso.orgPublished in SwitzerlandForeword ISO(the International Organization for Standardization)and IEC(the International Electrotechnical Commission)form the specialized system for worldwide standardization.National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity.ISO and IEC technical committees collaborate in fields of mutual interest.Other international organizations,governmental and non-governmental,in liaison with ISO and IEC,also take part in the work.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives,Part 1.In particular,the different approval criteria needed for the different types of document should be noted(see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.ISO and IEC shall not be held responsible for identifying any or all such patent rights.Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received(see www.iso.org/patents)or the IEC list of patent declarations received(see http:/patents.iec.ch).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation of the voluntary nature of standards,the meaning of ISO specific terms and expressions related to conformity assessment,as well as information about ISOs adherence to the World Trade Organization(WTO)principles in the Technical Barriers to Trade(TBT)see www.iso.org/iso/foreword.html.This document was prepared by SNIA(as SNIA Emerald Power Efficiency Measurement Specification V3.0.3)and drafted in accordance with its editorial rules.It was adopted,under the JTC 1 PAS procedure,by Joint Technical Committee ISO/IEC JTC 1,Information technology.Any feedback or questions on this document should be directed to the users national standards body.A complete listing of these bodies can be found at www.iso.org/members.html.ISO/IEC 24091:2019(E)ISO/IEC 2019 All rights reservediiiContents 1 Introduction.vii 2 Scope.1 2.1 Abstract.1 2.2 Introduction.1 2.3 Current Revision.1 2.4 Purpose.1 2.5 Disclaimer.2 3 Normative References.3 4 Definitions,Symbols,Abbreviations,and Conventions.4 4.1 Overview.4 4.2 Definitions.4 4.3 Symbols and Abbreviated Terms.9 4.4 Expression of Provisions.9 4.5 Conventions.10 5 Taxonomy.11 5.1 Introduction.11 5.2 Taxonomy Categories.12 5.3 Taxonomy Classifications.12 5.4 Taxonomy Rules.12 5.5 Online Category.13 5.6 Near-Online Category.15 5.7 Removable Media Library Category.15 5.8 Virtual Media Library Category.16 6 Capacity Optimization.17 6.1 Introduction.17 6.2 Space Consuming Practices.17 6.3 COMs Characterized.17 7 Test Definition and Execution Rules.18 7.1 Overview.18 7.2 General Requirements and Definitions.18 7.3 Block Access Online and Near-Online Tests.30 7.4 File Access Online and Near-Online Active Test.33 7.5 Block and File Access Ready Idle Test.37 7.6 Block and File Access Capacity Optimization Test.37 7.7 Removable Media Library Testing.42 7.8 Virtual Media Library Testing.46 ISO/IEC 24091:2019(E)ISO/IEC 2019 All rights reservediv 8 Metrics.50 8.1 Taxonomy Considerations.50 8.2 Block Access Primary Metrics.50 8.3 File Access Primary Metrics.50 8.4 Power Efficiency Metric for Online and Near-Online Systems.50 8.5 Power Efficiency Metric for Removable Media Library Systems.52 8.6 Storage Power Efficiency Metric for Virtual Media Library Systems.52 8.7 Secondary Metrics.52 9 Disclosure Requirements.54 9.1 General.54 9.2 Product Identification.54 9.3 Test Metrics.54 9.4 Test Characterization.56 9.5 Product Under Test Description.57 Annex A(Normative)Suggested Power and Environmental Meters.59 A.1 Overview.59 A.2 Alternate Meter Usage.59 Annex B(Normative)Measurement Requirements.60 B.1 Online and Near-Online Block Access Data Collection and Processin