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Over the last twenty years, the open source community has provided more and more software on which the world's High Performance Computing (HPC) systems depend for performance and productivity. The community has invested millions of dollars and years of effort to build key components. But although the investments in these separate software elements have been(More)
Current production Grids involve hundreds of sites and thousands of machines. In this context, P2P solutions are well suited - with regard to existing centralized and hierarchical approaches - to implement highly scalable, decentralized, reliable and manageable grid services. In this paper we describe the GReIC Data Gather Service from an architectural and(More)
A huge quantity of Earth Observation (EO) and geospatial data is daily produced by several organizations. These heterogeneous data are very useful in several scientific, civil, military and industrial applications.Securely and transparently storing, managing and accessing this huge quantity of data spread over distributed systems is a challenging problem.(More)