OGSA, Open Grid Services Architecture is an open standard architecture where service naming and description mechanism, grid-service behavior and discovering transient, location transparency, and protocol bindings are defined.
OGSA is developed upon web services concepts and technologies. It applies layered architecture consisting of applications and services, platform services, Open Grid Service Infrastructure (OGSI) and Web Services Resource Framework (WSRF), and hosting environment and protocols.
OGSA aims at expanding web services functions to utilize IT resources as standardized grid services.
GGF, Global Grid Forum is "the community of users, developers, and vendors" of the grid computing and its services.
GGF is responsible for the standardization, development, and adoption of OGSA.
Currently, "thousands of individuals in industry and research" working at "over 400 organizations in more than 50 countries" are participating the forum
according to its website.
The Globus Toolkit is "an open source software toolkit used for building grids."
It applies the OGSA architecture and provides a development environment for grid services. The first version appeared in 1998, and the latest version so far is version 4.0.
Detailed information can be found in the website of the Globus Alliance who is responsible for the toolkit:
The Globus Alliance.
Grid computing and its services are developed upon web services technologies. Grid services utilizes same coding practices and conform to standards such as XML, WSDL and SOAP.
More information on the web services is available on the following presentation:
Web Services presentation.
