Open Grid Services Infrastructure
Encyclopedia
The Open Grid Services Infrastructure (OGSI) was published by the Global Grid Forum (GGF) as a proposed recommendation in June 2003. It was intended to provide an infrastructure layer for the Open Grid Services Architecture (OGSA)
. OGSI takes the statelessness issues (along with others) into account by essentially extending Web services to accommodate grid computing
resources that are both transient and stateful.
(WSRF). With the release of GT4
, the open source tool kit is migrating back to a pure Web services implementation (rather than OGSI), via integration of the WSRF.
"OGSI, which was the former set of extensions to Web services to provide stateful interactions -- I would say at this point is obsolete," Jay Unger said. "That was the model that was used in the Globus Toolkit 3.0, but it's been replaced by WSRF, WS-Security, and the broader set of Web services standards. But OGSA, which focuses on specific service definition in the areas of execution components, execution modeling, grid data components, and information virtualization, still has an important role to play in the evolution of standards and open source tool kits like Globus."
Open Grid Services Architecture
The Open Grid Services Architecture describes an architecture for a service-oriented grid computing environment for business and scientific use, developed within the Global Grid Forum...
. OGSI takes the statelessness issues (along with others) into account by essentially extending Web services to accommodate grid computing
Grid computing
Grid computing is a term referring to the combination of computer resources from multiple administrative domains to reach a common goal. The grid can be thought of as a distributed system with non-interactive workloads that involve a large number of files...
resources that are both transient and stateful.
Obsolescence
Web services groups started to integrate their own approaches to capturing state into the Web Services Resource FrameworkWeb Services Resource Framework
Web Services Resource Framework is a family of OASIS-published specifications for web services. Major contributors include the Globus Alliance and IBM.A web service by itself is nominally stateless, i.e., it retains no data between invocations...
(WSRF). With the release of GT4
Globus Toolkit
The Globus Toolkit, currently at version 5, is an open source toolkit for building computing grids developed and provided by the Globus Alliance.-Standards implementation:The Globus Toolkit is an implementation of the following standards:...
, the open source tool kit is migrating back to a pure Web services implementation (rather than OGSI), via integration of the WSRF.
"OGSI, which was the former set of extensions to Web services to provide stateful interactions -- I would say at this point is obsolete," Jay Unger said. "That was the model that was used in the Globus Toolkit 3.0, but it's been replaced by WSRF, WS-Security, and the broader set of Web services standards. But OGSA, which focuses on specific service definition in the areas of execution components, execution modeling, grid data components, and information virtualization, still has an important role to play in the evolution of standards and open source tool kits like Globus."