SNIA Cloud Data Management Interface (CDMI)

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Cloud Standard

1. The name of the specification

SNIA Cloud Data Management Interface

2. A short statement (<100 words) of the purpose and function of the specification The SNIA Cloud Data Management Interface (CDMI) is the functional interface that applications will use to create, retrieve, update and delete data elements from the cloud. As part of this interface the client will be able to discover the capabilities of the cloud storage offering and use this interface to manage containers and the data that is placed in them. In addition, metadata can be set on containers and their contained data elements through this interface.

3. The version number (or other distinct identifier) and date of the most recently approved version of the specification.

SNIA Architecture – 1.0 standard

4. If the specification is part of a group of explicitly related specifications from the same source, the name of the group of specifications. Not applicable

5. URI for the normative text of the specification


6. The name of the SDO that generated/authored/hosted the specification. Storage Networking Industry Association

7. URI for the SDO

8. The level of approval that the SDO has conferred on the specification as described by the SDO’s process. SNIA Architecture (Final Standard)

9. The language or languages in which the specification is available. US English


10. Which of the categories of Cloud services does the standard address? (Infrastructure as a Service – IaaS, Data Storage as a Service – DaaS, Platform as a Service – PaaS, Software as a Service – SaaS) DaaS (Cloud Storage)

11. Does the standard address both functional and management aspects of the service? Yes. Management is done by setting metadata on containers of data and individual data elements. The functional interface allows CRUD semantics for storage of data via HTTP.


12. The level of approval of the specification in this generic lifecycle taxonomy:

Final standard

13. URI for the applicable SDO’s patent and copyright rules, if any, applicable to development and use of the specification. SNIA IP Policy

14. URI for the SDO’s posting location, (if any) for notices from participants or individuals regarding claims under the rules stated under number 15. SNIA IP Policy

15. Interoperability, conformance, or certification test activity for the specification (by owner name or URI).


16. Known implementations of the specification (by owner name or URI).

The SNIA Cloud Storage TWG is producing an open source reference implementation.

17. A list (or URI pointer to same) of the other specifications* that are normatively referenced in the specification.

[ISO-8601] International Standards Organization, “Data elements and interchange formats — Information interchange — Representation of dates and times”, ISO 8601:20044 –

[ITU-T509] International Telecommunications Union Telecommunication Standardization Sector (ITU-T), Recommendation X.509: Information technology – Open Systems Interconnection – The Directory: Public-key and attribute certificate frameworks, May 2000. Specification and technical corrigenda –

[RFC2119] IETF RFC 2119. Key words for use in RFCs to Indicate Requirement Levels –

[RFC2045] IETF RFC 2045. Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies –

[RFC2578] IETF RFC 2578. Structure of Management Information Version 2 (SMIv2) –

[RFC2616] IETF RFC 2616. Hypertext Transfer Protocol — HTTP/1.1 –

[RFC3280] IETF RFC 3280. Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile –

[RFC3530] IETF RFC 3530. Network File System (NFS) version 4 Protocol –

[RFC3986] IETF RFC 3986. Uniform Resource Identifier (URI): Generic Syntax – http://www.ietf/org/rfc/rfc3986.txt

[RFC4346] IETF RFC 4346. The Transport Layer Security (TLS) Protocol Version 1.1 –

[RFC4627] IETF RFC 4627. The application/json Media Type for JavaScript Object Notation (JSON) –

[RFC5246] IETF RFC 5246. The Transport Layer Security (TLS) Protocol Version 1.2 –

18. A list (or URI pointer to same) of the other specifications* that are referenced in the specification (except the ones listed under number 17).

[CRC] Williams, Ross, “A Painless Guide to CRC Error Detection Algorithms”, Chapter 16, August 1993,

[PKS12] RSA Laboratories, PKCS #12: Personal Information Exchange Syntax, Version 1.0, June 1999. Specification and Technical Corrigendum –

[REST] “Representational State Transfer” –

[RESTful Web] Richardson, Leonard and Sam Ruby, RESTful Web Services, O’Reilly, 2007.

[SIRDM] Storage Industry Resource Domain Model –

19. A list (or URI pointer to same) of other specifications* with which the specification may (speculatively) interoperate or act in complementary, compatible fashion.

OCCI – see OGF entry.

20. A list (or URI pointer to same) of other specifications* similar to this specification. (Whether or not substitutable.)


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