ISO/IEC 24775-1:2021

INTERNATIONAL ISO/IEC
STANDARD 24775-1
Second edition
2021-03
Information technology — Storage
management —
Part 1:
Overview
Reference number
ISO/IEC 24775-1:2021(E)
©
ISO/IEC 2021

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ISO/IEC 24775-1:2021(E)

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ISO/IEC 24775-1:2021(E)
Foreword
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 ISO's 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 Storage Management Technical Specification, Part 1 Overview,
Version 1.8.0, Revision 5) 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.
This second edition cancels and replaces the first edition (ISO/IEC 24775-1:2014), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— USAGE text was revised to address code (now included in the front matter for all SNIA specifications)
— All recipes and their references were deleted.
— Instances of subprofile were changed to profile. In the annex, instances of subprofile were changed
to component profile (TSG meeting voice vote).
— Profile versions and related text were updated. (TSG meeting voice vote).
— Indications have been replaced by DMTF Indications, and all affected clauses updated. (TSG meeting
voice vote).
— Instances of Experimental within profiles already labeled as Experimental were removed to avoid
confusion and redundancy. (Editorial change)
— CIM/XML was changed to CIM-XML (Response to ballot comments).
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ISO/IEC 24775-1:2021(E)
— Annex: SMI-S Information Model.
— The CIM schema version was changed to 2.51 for V1.8.0 Rev3.
— Substantial editorial clean up to align CIM references with existing XML.
— Team WBEM server used consistently.
— Changes references from the Indication Profile to the Indications Profile in the Storage Management
Technical Specification, Part 3 Common Profiles, which now references the DMTF Indications.
A list of all parts in the ISO/IEC 24775 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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ISO/IEC 24775-1:2021(E)
1 INTENDED AUDIENCE
2 This document is intended for use by individuals and companies engaged in developing, deploying, and
3 promoting interoperable multi-vendor SANs through the Storage Networking Industry Association (SNIA)
4 organization.
5 CHANGES TO THE SPECIFICATION
6 Each publication of this specification is uniquely identified by a three-level identifier, comprised of a
7 version number, a release number and an update number. The current identifier for this specification is
8 version 1.8.0. Future publications of this specification are subject to specific constraints on the scope of
9 change that is permissible from one publication to the next and the degree of interoperability and
10 backward compatibility that should be assumed between products designed to different publications of
this standard. The SNIA has defined three levels of change to a specification:
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• Major Revision: A major revision of the specification represents a substantial change to the underlying scope
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or architecture of the SMI-S API. A major revision results in an increase in the version number of the version
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identifier (e.g., from version 1.x.x to version 2.x.x). There is no assurance of interoperability or backward
compatibility between releases with different version numbers.
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• Minor Revision: A minor revision of the specification represents a technical change to existing content or an
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adjustment to the scope of the SMI-S API. A minor revision results in an increase in the release number of
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the specification’s identifier (e.g., from x.1.x to x.2.x). Minor revisions with the same version number preserve
interoperability and backward compatibility.
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• Update: An update to the specification is limited to minor corrections or clarifications of existing specification
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content. An update will result in an increase in the third component of the release identifier (e.g., from x.x.1 to
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x.x.2). Updates with the same version and minor release levels preserve interoperability and backward
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compatibility.
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TYPOGRAPHICAL CONVENTIONS
24
Maturity Level
25
In addition to informative and normative content, this specification includes guidance about the maturity
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of emerging material that has completed a rigorous design review but has limited implementation in
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commercial products. This material is clearly delineated as described in the following sections. The
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typographical convention is intended to provide a sense of the maturity of the affected material, without
29 altering its normative content. By recognizing the relative maturity of different sections of the standard, an
30 implementer should be able to make more informed decisions about the adoption and deployment of
31 different portions of the standard in a commercial product.
32
This specification has been structured to convey both the formal requirements and assumptions of the
33 SMI-S API and its emerging implementation and deployment lifecycle. Over time, the intent is that all
34 content in the specification will represent a mature and stable design, be verified by extensive
35 implementation experience, assure consistent support for backward compatibility, and rely solely on
36 content material that has reached a similar level of maturity. Unless explicitly labeled with one of the
subordinate maturity levels defined for this specification, content is assumed to satisfy these
37 requirements and is referred to as “Finalized”. Since much of the evolving specification
38 content in any given release will not have matured to that level, this specification defines three
subordinate levels of implementation maturity that identify important aspects of the content’s increasing
39
maturity and stability. Each subordinate maturity level is defined by its level of implementation
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experience, its stability and its reliance on other emerging standards. Each subordinate maturity level is
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identified by a unique typographical tagging convention that clearly distinguishes content at one maturity
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model from content at another level.
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ISO/IEC 24775-1:2021(E)
46 Experimental Maturity Level
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No material is included in this document unless its initial architecture has been completed and reviewed.
48
Some content included in this document has complete and reviewed design, but lacks implementation
49
experience and the maturity gained through implementation experience. This content is included in order
50
to gain wider review and to gain implementation experience. This material is referred to as
51
“Experimental”. It is presented here as an aid to implementers who are interested in likely future
52
developments within the SMI specification. The contents of an Experimental profile may change as
implementation experience is gained. There is a high likelihood that the changed content will be included
53
in an upcoming revision of the specification. Experimental material can advance to a higher maturity level
54
as soon as implementations are available. Figure 1 is a sample of the typographical convention for
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Experimental content.
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EXPERIMENTAL
59
Experimental content appears here.
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EXPERIMENTAL
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Figure 1 - Experimental Maturity Level Tag
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Implemented Maturity Level
68
Profiles for which initial implementations have been completed are classified as “Implemented”. This
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indicates that at least two different vendors have implemented the profile, including at least one provider
implementation. At this maturity level, the underlying architecture and modeling are stable, and changes
in future revisions will be limited to the correction of deficiencies identified through additional
implementation experience. Should the material become obsolete in the future, it must be deprecated in a
minor revision of the specification prior to its removal from subsequent releases. Figure 2 is a sample of
the typographical convention for Implemented content.
IMPLEMENTED
Implemented content appears here.
70
IMPLEMENTED
71
72
Figure 2 - Implemented Maturity Level Tag
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Stable Maturity Level
Once content at the Implemented maturity level has garnered additional implementation experience, it
can be tagged at the Stable maturity level. Material at this maturity level has been implemented by three
different vendors, including both a provider and a client. Should material that has reached this maturity
level become obsolete, it may only be deprecated as part of a minor revision to the specification. Material
at this maturity level that has been deprecated may only be removed from the specification as part of a
major revision. A profile that has reached this maturity level is guaranteed to preserve backward
compatibility from one minor specification revision to the next. As a result, Profiles at or above the Stable
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ISO/IEC 24775-1:2021(E)
76 maturity level shall not rely on any content that is Experimental. Figure 3 is a sample of the typographical
77 convention for Implemented content.
STABLE
Stable content appears here.
STABLE
Figure 3 - Stable Maturity Level Tag
78 Finalized Maturity Level
79 Content that has reached the highest maturity level is referred to as “Finalized.” In addition to satisfying
80 the requirements for the Stable maturity level, content at the Finalized maturity level must solely depend
81 upon or refine material that has also reached the Finalized level. If specification content depends upon
82 material that is not under the control of the SNIA, and therefore not subject to its maturity level
83 definitions, then the external content is evaluated by the SNIA to assure that it has achieved a
84 comparable level of completion, stability, and implementation experience. Should material that has
85 reached this maturity level become obsolete, it may only be deprecated as part of a major revision to the
86 specification. A profile that has reached this maturity level is guaranteed to preserve backward
87 compatibility from one minor specification revision to the next. Over time, it is hoped that all specification
content will attain this maturity level. Accordingly, there is no special typographical convention, as there is
with the other, subordinate maturity levels. Unless content in the specification is marked with one of the
typographical conventions defined for the subordinate maturity levels, it should be assumed to have
reached the Finalized maturity level.
Deprecated Material
Non-Experimental material can be deprecated in a subsequent revision of the specification. Sections
identified as “Deprecated” contain material that is obsolete and not recommended for use in new
development efforts. Existing and new implementations may still use this material, but shall move to the
newer approach as soon as possible. The maturity level of the material being deprecated determines how
long it will continue to appear in the specification. Implemented content shall be retained at least until the
next revision of the specialization, while Stable and Finalized material shall be retained until the next
88
major revision of the specification. Providers shall implement the deprecated elements as long as it
89
appears in the specification in order to achieve backward compatibility. Clients may rely on deprecated
90
elements, but are encouraged to use non-deprecated alternatives when possible.
91
Deprecated sections are documented with a reference to the last published version to include the
92
deprecated section as normative material and to the section in the current specification with the
93
replacement. Figure 4 contains a sample of the typographical convention for deprecated content.
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DEPRECATED
98
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Content that has been deprecated appears here.
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DEPRECATED
102
Figure 4 - Deprecated Tag
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ISO/IEC 24775-1:2021(E)
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ISO/IEC 24775-1:2021(E)
Contents
List of Figures . 13
List of Tables . 15
Foreword . 17
1 Scope . 19
2 Normative References. 21
2.1 Overview . 21
2.2 Approved references. 21
2.3 References under development . 21
3 Term, Definitions, Symbols, Abbreviations, and Conventions. 23
4 Introduction. 25
4.1 Preamble. 25
4.2 Business Rationale . 25
4.3 Interface Definition . 26
4.4 Technology Trends . 28
4.5 Management Environment . 29
4.6 Architectural Objectives . 30
4.7 Disclaimer . 31
5 Overview. 33
5.1 Base Capabilities . 33
5.2 Object Oriented . 33
6 Functionality Matrix. 37
6.1 Overview . 37
6.2 Multi-Level Model Of Networked Storage Management Functionality . 37
6.3 FCAPS . 38
6.4 Management Functionality Within Each Level Of The Model . 38
6.5 Referring To Levels And Capabilities In The Multi-level Model. 39
6.6 Functionality Descriptions in SMI-S Profiles . 39
6.7 Capabilities of This Version.39
7 Operational Environment. 43
7.1 General . 43
7.2 Using this Specification . 44
7.3 Language Bindings . 45
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ISO/IEC 24775-1:2021(E)
LIST OF FIGURES
Figure 1 - Experimental Maturity Level Tag . 8
Figure 2 - Implemented Maturity Level Tag . 8
Figure 3 - Stable Maturity Level Tag. 9
Figure 4 - Deprecated Tag. 9
Figure 5 - Interface Functions . 26
Figure 6 - Large SAN Topology . 29
Figure 7 - Example Client Server Distribution in a SAN. 30
Figure 8 - Object Model/Server Relationship . 34
Figure 9 - Canonical Inheritance. 35
Figure 10 - Operational Environment. 44
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ISO/IEC 24775-1:2021(E)
LIST OF TABLES
Table 1 - Functionality Matrix.37
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ISO/IEC 24775-1:2021(E)
1
FOREWORD
2
The Overview part of the Storage Management Technical Specification contains informative clauses that
3
provide an overview of how SMI-S works. It is a useful base for understanding the details of the technical
4
specification. While the normative information of the specification is contained in other parts, this part
5
provides high-level introductory material on key concepts of the specification.
6
Parts of this Standard
7
This standard is subdivided in the following parts:
8
• Storage Management Technical Specification, Part 1 Overview, 1.8.0 Rev 4
9
• Storage Management Technical Specification, Part 2 Common Architecture, 1.8.0 Rev 4
10
• Storage Management Technical Specification, Part 3 Common Profiles, 1.8.0 Rev 4
11
• Storage Management Technical Specification, Part 4 Block Devices, 1.8.0 Rev 4
12
• Storage Management Technical Specification, Part 5 Filesystems, 1.8.0 Rev 4
13
• Storage Management Technical Specification, Part 6 Fabric, 1.8.0 Rev 4
14
• Storage Management Technical Specification, Part 7 Host Elements, 1.8.0 Rev 4
15
• Storage Management Technical Specification, Part 8 Media Libraries, 1.8.0 Rev 4
16
SNIA Web Site
17
Current SNIA practice is to make updates and other information available through their web site at
18
http://www.snia.org
19
SNIA Address
20
Requests for interpretation, suggestions for improvement and addenda, or defect reports are welcome. They
21
should be sent via the SNIA Feedback Portal at http://www.snia.org/feedback/ or by mail to the Storage Networking
22
Industry Association, 4360 ArrowsWest Drive, Colorado Springs, Colorado 80907, U.S.A.
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ISO/IEC 24775-1:2021(E)
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INTERNATIONAL STANDARD ISO/IEC 24775-1:2021(E)
1 1 Scope
2 This Technical Specification defines an interface for the secure, extensible, and interoperable
3 management of a distributed and heterogeneous storage system. This interface uses an object-oriented,
4 XML-based, messaging-based protocol designed to support the specific requirements of managing
5 devices and subsystems in this storage environment. Using this protocol, this Technical Specification
6 describes the information available to a WBEM Client from an SMI-S compliant WBEM Server.
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ISO/IEC 24775-1:2021(E)
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ISO/IEC 24775-1:2021(E)
1 2 Normative References
2 2.1 Overview
3
The following referenced documents are indispensable for the application of this document. For dated
4
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
5
6 2.2 Approved references
ISO/IEC 14776-452, SCSI Primary Commands - 3 (SPC-3) [ANSI INCITS.351-2005]
7
8 2.3 References under development
Storage Management Technical Specification, Part 2 Common Architecture, 1.8.0 Rev 4
9
Storage Management Technical Specification, Part 3 Common Profiles, 1.8.0 Rev 4
10
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ISO/IEC 24775-1:2021(E)
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ISO/IEC 24775-1:2021(E)
1 3 Term, Definitions, Symbols, Abbreviations, and Conventions
2 For the purposes of this document, the terms, definitions, symbols, abbreviations, and conventions given
3 in Storage Management Technical Specification, Part 2 Common Architecture, 1.8.0 Rev 4 apply.
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ISO/IEC 24775-1:2021(E)
1 4 Introduction
2 4.1 Preamble
3 Large Storage Systems and Storage Area Networks (SANs) are emerging as a prominent and
4 independent layer of IT infrastructure in enterprise class and midrange computing environments.
5 Examples of applications and functions driving the emergence of new storage technology include:
6 • Sharing of vast storage resources between multiple systems via networks,
7 • LAN free backup,
8 • Remote, disaster tolerant, on-line mirroring of mission critical data,
9 • Clustering of fault tolerant applications and related systems around a single copy of data.
10 • Archiving requirements for sensitive business information.
11 • Distributed database and file systems.
12 To accelerate the emergence of more functional and sophisticated storage systems in the market, the
13 industry requires a standard management interface that allows different classes of hardware and software
14 products supplied by multiple vendors to reliably and seamlessly interoperate for the purpose of
15 monitoring and controlling resources. The SNIA Storage Management Initiative (SMI) was created to
16 develop this specification (SMI-Specification or SMI-S), the definition of that interface. This standard
17 provides for heterogeneous, functionally rich, reliable, and secure monitoring/control of mission critical
18 global resources in complex and potentially broadly-distributed, multi-vendor storage topologies like
19 SANs. As such, this interface overcomes the deficiencies associated with legacy management systems
20 that deter customer uptake of more advanced storage management systems.
21 4.2 Business Rationale
22 This interface is targeted at creating broad multi-vendor management interoperability and thus increasing
23 customer satisfaction. To that end, this specification defines an “open” and extensible interface that
24 allows subsystems and devices within the global context of a large storage system to be reliably and
25 securely managed by overlying presentation frameworks and management systems in the context of the
26 rapidly evolving multi-vendor market. In specific, SAN integrators (like end-users, VARs, and SSPs) can,
27 via this standardized management interface, more flexibly select between multiple vendors when building
28 the hierarchy of software systems required to manage a large storage system independent of the
29 underlying hardware systems. Additionally, storage integrators can more flexibly select between alternate
30 hardware vendors when constructing storage configurations. Broad adoption of the standards defined
31 and extended in this specification will provide increased customer satisfaction and will:
32 • More rapidly expand the acceptance of new storage management technology like SANs and iSCSI;
33 • Accelerate customer acquisition of new storage management technology;
34 • Expand the total market.
35 Additionally, a single common management interface allows SAN vendors and integrators to decrease the
36 time required to bring new more functional technology, products, and solutions to market.
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ISO/IEC 24775-1:2021(E)
37 4.3 Interface Definition
38 This management interface allows storage management systems to reliably identify, classify, monitor, and
39 control physical and logical resources in a storage system. The fundamental relationship of this interface
40 to storage management software, presentation frameworks, user applications, SAN physical entities (i.e.,
41 devices), SAN discovery systems, and SAN logical entities is illustrated in Figure 7: "Interface
Functions".
Command Interface Graphical Interface
Application Framework
Media Data Migration
Other
Management (HSM)
Volume
Performance Capacity Planning Database System
Management
Resource
File System Backup System
Allocation
SMI-S Interface
Objects
LU LU Tape Virtual
LU Zone Host Port Other
Clone Snapshot Volum
...