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In this paper we present a scalable, integrated and service-oriented collaboration system, namely Global Multimedia Collaboration System, based on the XGSP collaboration framework and NaradaBrokering messaging middleware. This system can provide videoconferencing services to heterogeneous endpoints such as H.323, SIP, Access Grid, RealPlayer as wel...
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Citations
... To present the applicability of this investigation, we identify metadata management requirements of two application use domains: Global Multimedia Collaboration System (Glo-balMMCS [3]) and Pattern Informatics Geographical Information System Grid (PI GIS-Grid [4]). GlobalMMCS is a peer to peer collaboration environment, where videoconferencing sessions, with any number of widely distributed services, can take place. ...
We introduce a distributed high performance hybrid Information Service Ar- chitecture, which forms a metadata replica hosting system to manage both highly- dynamic, small-scale and relatively-large, static metadata associated to Grid/Web Servic- es. We present an empirical evaluation of the proposed architecture and investigate its practical usefulness. The results demonstrate that the proposed system achieves high- performance and fault-tolerance with negligible processing overheads. The results also indicate that efficient decentralized Information Service Architectures can be built by uti- lizing publish-subscribe based messaging schemes.
... These solutions target vastly different systems and address diverse sets of requirements (Zanikolas, 2005). For example, large-scale Grid applications require management of large amounts of relatively slow and varying metadata, while others such as e-Science Grid applications dynamically assemble modest numbers of distributed services and are designed for specific tasks, tasks that can be as diverse as forecasting earthquakes (Aktas, 2004) or managing audiovisual collaboration sessions (Wu, 2005). These dynamic Grid/Web service collections require specific support for dynamic metadata. ...
... We have previously investigated the design, implementation, and evaluation of two specific datasystems: UDDI XML Metadata Service and WS-Context XML Metadata Service (Aktas-a, 2008). We designed, implemented, and evaluated centralized versions of these metadata-systems and applied them to different application domains, such as geographical information systems, sensor grids (Aktas, 2004), and collaboration grids (Wu, 2005). However, these systems did not fully meet the aforementioned metadata management requirements of these application use domains. ...
We propose a novel approach to managing information in grids. The proposed approach is an add-on information system that provides unification and federation of grid information services. The system interacts with local information services and assembles their metadata instances under one hybrid architecture to provide a common query/publish interface to different kinds of metadata. The system also supports interoperability of major grid information services by providing federated information management. We present the semantics and architectural design for this system. We introduce a prototype implementation and present its evaluation. As the results indicate, the proposed system achieves unification and federation of custom implementations of grid information services with negligible processing overheads.
We propose a novel approach to managing information in grids. The proposed approach is an add-on information system that provides unification and federation of grid information services. The system interacts with local information services and assembles their metadata instances under one hybrid architecture to provide a common query/publish interface to different kinds of metadata. The system also supports interoperability of major grid information services by providing federated information management. We present the semantics and architectural design for this system. We introduce a prototype implementation and present its evaluation. As the results indicate, the proposed system achieves unification and federation of custom implementations of grid information services with negligible processing overheads.
Independent Grid projects have developed their own solutions to Information Services. These solutions are not interoperable with each other, target vastly different systems and address diverse sets of requirements. To address these challenges, we designed a novel architecture for a Grid Information Service that provides unification, federation and interoperability of major grid information services. The proposed approach forms an add-on information system that interacts with the local information services and assembles their metadata instances under one hybrid architecture. We present our experiences in designing semantics and architectural design of this system. We introduce a prototype implementation and present its evaluation. The results indicate that the proposed approach achieves unification and federation of custom implementations of grid information services with negligible processing overheads.
Independent Grid projects have developed their own solutions to Information Services. These solutions are not interoperable with each other, target vastly different systems and address diverse sets of requirements. To address these challenges, we designed a novel architecture for a Grid Information Service that provides unification, federation and interoperability of major grid information services. The proposed approach forms an add-on information system that interacts with the local information services and assembles their metadata instances. We introduce a prototype implementation and present its evaluation. The results indicate that the proposed approach achieves unification and federation of custom implementations of grid information services with negligible processing overheads.
