Page 120 - Cloud computing: From paradigm to operation

1 Framework and requirements for cloud computing

1 Scope

This Recommendation provides overview and functional requirements for data storage federation (DSF)
including benefits, configuration for logical components and ecosystem of data storage federation as well as
cloud computing based data storage federation. The functional requirements provided in this
Recommendation are derived from use cases.

2 References
The following ITU-T Recommendations and other references contain provisions which, through reference in
this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated
were valid. All Recommendations and other references are subject to revision; users of this Recommendation
are therefore encouraged to investigate the possibility of applying the most recent edition of the
Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is
regularly published. The reference to a document within this Recommendation does not give it, as a stand-
alone document, the status of a Recommendation.

[ITU-T Y.3500] Recommendation ITU-T Y.3500 (2014), Information technology – Cloud computing –
Overview and vocabulary.

[ITU-T Y.3502] Recommendation ITU-T Y.3502 (2014), Information technology – Cloud computing –
Reference architecture.

3 Definitions

3.1 Terms defined elsewhere
This Recommendation uses the following terms defined elsewhere:
3.1.1 activity [ITU-T Y.3502]: A specified pursuit or set of tasks.

3.1.2 cloud computing [ITU-T Y.3500]: Paradigm for enabling network access to a scalable and elastic pool
of shareable physical or virtual resources with self-service provisioning and administration on-demand.
NOTE – Examples of resources include servers, operating systems, networks, software, applications and storage
equipment.

3.1.3 cloud service customer [ITU-T Y.3500]: Party which is in a business relationship for the purpose of
using cloud services.

NOTE – A business relationship does not necessarily imply financial agreements.
3.1.4 cloud service provider [ITU-T Y.3500]: Party which makes cloud services available.
3.1.5 metadata [b-ISO/IEC 2382]: Data about data or data elements, possibly including their data
descriptions, and data about data ownership, access paths, access rights and data volatility.

3.1.6 role [ITU-T Y.3502]: A set of activities that serves a common purpose.
3.1.7 sub-role [ITU-T Y.3502]: A subset of the activities of a given role.

3.2 Terms defined in this Recommendation

This Recommendation defines the following terms:
3.2.1 data storage federation (DSF): A processing to provide a single virtual volume from the multiple
heterogeneous data storages using storage virtualization.
NOTE – In this Recommendation, heterogeneous storage refers to DSF local storage.

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