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. Mathe, Zoltan The Grid was developed to solve large-scale scientific problems by providing access to widearea distributed computing resources. The Grid is used by various communities: high-energy physics, earth observation, biology, etc. LHCb is one of the four Large Hadron Collider (LHC) experiments based at the European Organisation for Nuclear Research (CERN). The LHCb experiment produces a huge amount of data.
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As a single institution does not have the computing resources to handle this data, Grid computing is adopted to store and process the data. Managing PetaBytes of data in distributed environments provides a large scale of challenges related to performance, reliability and scalability. The little mermaid 2 game download free. PetaBytes of data are spread over several Grid sites. The users and applications need an efficient mechanism to locate datasets based on their content, which can be achieved by associating descriptive attributes to these datasets and providing the associated information to the users. A Grid service, called the Metadata Catalogue was.
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Segal, B; Gagliardi, F; Carminati, F 2000-01-01 The goal of this project is the development of a novel environment to support globally distributed scientific exploration involving multi- PetaByte datasets. The project will devise and develop middleware solutions and testbeds capable of scaling to handle many PetaBytes of distributed data, tens of thousands of resources (processors, disks, etc.), and thousands of simultaneous users. The scale of the problem and the distribution of the resources and user community preclude straightforward replication of the data at different sites, while the aim of providing a general purpose application environment precludes distributing the data using static policies. We will construct this environment by combining and extending newly emerging 'Grid' technologies to manage large distributed datasets in addition to computational elements.
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A consequence of this project will be the emergence of fundamental new modes of scientific exploration, as access to fundamental scientific data is no longer constrained to the producer of. Mahadevan, Vijay S.; Smith, Michael A. 2011-01-01 The Even-parity neutron transport equation with FE-SN discretization is solved traditionally using SOR preconditioned CG method at the lowest level of iterations in order to compute the criticality in reactor analysis problems. The use of high order isoparametric finite elements prohibits the formation of the discrete operator explicitly due to memory constraints in peta scale architectures.
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Hence, a h-p multi-grid preconditioner based on linear tessellation of the higher order mesh is introduced here for the space-angle system and compared against SOR and Algebraic MG black-box solvers. The performance and scalability of the multi-grid scheme was determined for two test problems and found to be competitive in terms of both computational time and memory requirements. The implementation of this preconditioner in an even-parity solver like UNIC from ANL can further enable high fidelity calculations in a scalable manner on peta flop machines. (author). Bromage, J.; Zuegel, J.D.; Bahk, S.W.; Vickery, D.S.; Waxer, L.J.; Irwin, D.; Bagnoud, V.; Boni, R.; Moore, M.D.; Jungquist, R.; Stoeckl, C. Rochester Univ., Lab. For Laser Energetics, NY (United States) 2006-06-15 OMEGA EP (Extended Performance) is a new high-energy peta-watt laser system under construction at the University of Rochester's Laboratory for Laser Energetics.
This paper describes our designs for two diagnostics critical to OMEGA EP's mission. The focal-spot diagnostic (FSD) is responsible for characterizing the focal spot of OMEGA EP's off-axis parabolic mirror at full energy. The ultrafast temporal diagnostic (UTD) is responsible for characterizing pulse shapes of full-energy target shots ranging in width from.
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