Open Grid Services Architecture: Difference between revisions

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{{primary sources|date=September 2011}}

The '''Open Grid Services Architecture''' ('''OGSA''') describes an architecture for a [[Service-oriented architecture|service-oriented]] [[grid computing]] environment for business and scientific use, developed within the [[Global Grid Forum|Global Grid Forum (GGF)]]. OGSA is based on several other [[Web service]] technologies, notably [[WSDL]] and [[Simple Object Access Protocol|SOAP]], but it aims to be largely agnostic in relation to the transport-level handling of data.

{{buzzwords|date=October 2020}}

Briefly, OGSA is a distributed interaction and computing architecture based around services, assuring interoperability on heterogeneous systems so that different types of resources can communicate and share information.

'''Open Grid Services Architecture''' ('''OGSA''') describes a [[service-oriented architecture]] for a [[grid computing]] environment for business and scientific use.

It was developed within the [[Open Grid Forum]], which was called the Global Grid Forum (GGF) at the time, around 2002 to 2006.

==Description==

According to the [http://www.gridforum.org/documents/GFD.53.pdf OGSA Roadmap document], OGSA is:

Briefly, OGSA is a distributed interaction and computing architecture based around services, assuring interoperability on heterogeneous systems so that different types of resources can communicate and share information. OGSA is based on several other [[Web service]] technologies, such as the [[Web Services Description Language]] (WSDL) and the [[Simple Object Access Protocol]] (SOAP), but it aims to be largely independent of transport-level handling of data.

OGSA has been described as a refinement of a Web services architecture, specifically designed to support grid requirements.<ref>[http://www.nesc.ac.uk/teams/OGSAanalysisDennisGannon.pdf An Analysis of The Open Grid Services Architecture]{{Dead link|date=August 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>

The concept of OGSA is derived from work presented in the 2002 Globus Alliance paper "The Physiology of the Grid" by [[Ian Foster (computer scientist)|Ian Foster]], [[Carl Kesselman]], Jeffrey M. Nick, and Steven Tuecke.<ref>{{Cite web |title= The Physiology of the Grid: An Open Grid Services Architecture for Distributed Systems Integration |author= [[Ian Foster (computer scientist)|Ian Foster]], [[Carl Kesselman]], Jeffrey M. Nick, and Steven Tuecke |date= 23 June 2002 |publisher= Globus Alliance |url= http://www.globus.org/alliance/publications/papers/ogsa.pdf |accessdate= 28 July 2013 }}</ref>

It was developed by GGF working groups which resulted in a document, entitled ''The Open Grid Services Architecture, Version 1.5'' in 2006.<ref name="GFD80">{{Cite web |author= |date=24 July 2006 |editor-last=Foster |editor-first=I. |editor2-last=Kishimoto |editor2-first=H. |editor3-last=Savva |editor3-first=A. |title=The Open Grid Services Architecture, Version 1.5 |url=http://www.ogf.org/documents/GFD.80.pdf |accessdate=28 July 2013 |publisher=Open Grid Forum}}</ref>

The GGF published some use case scenarios.<ref>[http://www.ogf.org/documents/GFD.29.pdf OGSA Tier 1 Use Case Draft Document]</ref>

*According to the "Defining the Grid: A Roadmap for OGSA Standards v 1.0", OGSA is:<ref>[http://www.gridforumogf.org/documents/GFD.53.pdf Defining the Grid: A Roadmap for OGSA™OGSA Standards v 1.0]</ref>

* An architectural process in which the GGF's OGSA Working Group collects requirements and maintains a set of informational documents that describe the architecture;

* A set of normative specifications and [[Profile#Engineering (engineering)|profiles]] that document the precise requirements for a conforming hardware or software component;

* Software components that adhere to the OGSA specifications and profiles, enabling deployment of grid solutions that are interoperable even though they may be based on implementations from multiple sources.

The Open Grid Services Architecture, Version 1.5 described these capabilities:<ref name="GFD80" />

The [http://www.ggf.org/documents/GFD.30.pdf OGSA Architecture document] describes an OGSA grid in terms of the following <i>capabilities</i>:

* Infrastructure services

* Execution Management services

Line 17 ⟶ 26:

* Information services

AsIn of earlylate 2006 thean firstupdated version of the OGSA Architecture document and several associated documents have beenwere published., Severalincluding normativethe OGSAfirst documentsof areseveral expectedplanned tonormative be published by mid-2006documents, along"Open withGrid an updatedServices Architecture document. DevelopmentGlossary of conformantTerms, softwareVersion is1.5".<ref>[http://www.ogf.org/documents/GFD.81.pdf expectedOpen toGrid followServices rapidlyArchitecture once a critical massGlossary of normativeTerms, documentsVersion have1.5]</ref> been published.

The concept of OGSA is derived from work presented in the paper "[http://www.globus.org/alliance/publications/papers/ogsa.pdf The Physiology of the Grid]" by [[Ian Foster]], [[Carl Kesselman]], Jeffrey M. Nick, and Steven Tuecke.

The [[Open Grid Services Infrastructure|Open Grid Services Infrastructure (OGSI)]] is related to OGSA, as it was originally intended to form the basic “plumbing” layer for OGSA. It has been superseded by [[WSRF]] and [[WS-Management]].

The [[Open Grid Services Infrastructure|Open Grid Services Infrastructure]] (OGSI)]] is related to OGSA, as it was originally intended to form the basic “plumbing” layer for OGSA. It has beenwas superseded by [[WSRFWeb Services Resource Framework]] (WSRF) and [[WS-Management]].

[[Category:Distributed computing]]

== See also References==

{{reflist}}

== External links ==

* [{{official website|http://forge.gridforum.org/sf/projects/ogsa-wg OGSA Working Group home page]/}}

* [http://www.gridforum.org/documents/GFD.53.pdf Defining the Grid: A Roadmap for OGSA™ Standards v 1.0]

* [http://www.ggfogf.org/documents/GFD.3072.pdf TheOGSA OpenWSRF GridBasic Services ArchitectureProfile, Version 1.0]

* [http://www.ggf.org/documents/GFD.44.pdf Open Grid Services Architecture Glossary of Terms]

[[Category:Grid computing]]