Abstract. Poznan Supercomputing and Networking Center has been involved in continuous research concerning the development of grid environments. In the scope of the PROGRESS project we designed a Grid Service Provider (GSP) which acts as a new additional layer between the grid and grid user interfaces. The introduction of the GSP enables easy development of many different grid user interfaces such as web portals and standalone applications. In this paper we present this newly distinguished item of grid-portal environment architecture, which might improve the flexibility of grid user interfaces.
Not many fully integrated Grid solutions exist on today's market. In this paper we present the PSNC's Grid toolkit, called Gridge, which is fully integrated Grid environment, consisting of tools and Grid services to enable challenging scientific and commercial applications on the Grid.
SUMMARYThe grid research that has been intensely undertaken in the recent years has resulted in a long list of excellent solutions for the access to and utilization of powerful remote computing resources. Some of these solutions have emerged into standards or good practices widely accepted by the grid community. However, a lot of other important standards are yet to be found and the range of available middleware, protocols and services causes not only a serious problem when deciding on the technology to be used for a particular grid environment, but also poses a major challenge when trying to solve some ongoing issues. The lack of standards and heterogeneity of the grid middleware used is, for example, a big challenge when designing science gateways that are set to provide the scientific community with means of accessing the vast amount of the powerful grid resources delivered by multiple independent grid infrastructures administered by different types of grid management systems. In this paper, we present a method by which we addressed this problem within the PROGRESS project and how it resulted in the design of the grid resource broker plug-in mechanism, which allows the enabling of resources belonging to heterogeneous grid infrastructures within a computing portal.
Over the recent years numerous digital libraries have been deployed and enabled in the Internet with the use of various digital library frameworks. They contain valuable digital resources use of which is important to a large community of users, especially within the scientific and educational communities. The access to distributed digital resources has been a subject of research for a few years now. In this paper we present our own work in this area, discussing our approach at the distributed digital library platform that is widely used within the PIONIER optical network. We present the methodology for building distributed search and access to digital publications that allowed to create a national federation of digital libraries and that is now under investigation for possible use within various application fields including medicine, science and education.
SUMMARYIn this paper we present our motivations and ideas for workflow management based on our experiences gained in two projects: GridLab and PROGRESS. In these projects we have been dealing with real use cases and end users' requirements for workflow management. Therefore, we were able to define and implement functional workflow extensions to the Grid(Lab) Resource Management System (GRMS). GRMS is a resource management system with a workflow engine that executes and manages jobs on remote Grid resources. One can submit to GRMS workflow experiments based on an XML workflow schema, defining flexible mechanisms for dynamic workflow control, including various types of precedence constraints, different locations of the final data products and executables, etc. All of these features allow end users to speed up remote workflow calculations and improve data management mechanisms.
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