747 research outputs found

    Large Scale In Silico Screening on Grid Infrastructures

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    Large-scale grid infrastructures for in silico drug discovery open opportunities of particular interest to neglected and emerging diseases. In 2005 and 2006, we have been able to deploy large scale in silico docking within the framework of the WISDOM initiative against Malaria and Avian Flu requiring about 105 years of CPU on the EGEE, Auvergrid and TWGrid infrastructures. These achievements demonstrated the relevance of large-scale grid infrastructures for the virtual screening by molecular docking. This also allowed evaluating the performances of the grid infrastructures and to identify specific issues raised by large-scale deployment.Comment: 14 pages, 2 figures, 2 tables, The Third International Life Science Grid Workshop, LSGrid 2006, Yokohama, Japan, 13-14 october 2006, to appear in the proceeding

    An Interactive Environment for Supporting the Transition from Simulation to Optimization

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    Use of A Network Enabled Server System for a Sparse Linear Algebra Grid Application

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    Solving systems of linear equations is one of the key operations in linear algebra. Many different algorithms are available in that purpose. These algorithms require a very accurate tuning to minimise runtime and memory consumption. The TLSE project provides, on one hand, a scenario-driven expert site to help users choose the right algorithm according to their problem and tune accurately this algorithm, and, on the other hand, a test-bed for experts in order to compare algorithms and define scenarios for the expert site. Both features require to run the available solvers a large number of times with many different values for the control parameters (and maybe with many different architectures). Currently, only the grid can provide enough computing power for this kind of application. The DIET middleware is the GRID backbone for TLSE. It manages the solver services and their scheduling in a scalable way.La rĂ©solution de systĂšmes linĂ©aires creux est une opĂ©ration clĂ© en algĂšbre linĂ©aire. Beaucoup d’algorithmes sont utilisĂ©s pour cela, qui dĂ©pendent de nombreux paramĂštres, afin d’offrir une robustesse, une performance et une consommation mĂ©moire optimales. Le projet GRID-TLSE fournit d’une part, un site d’expertise basĂ© sur l’utilisation de scĂ©narios pour aider les utilisateurs Ă  choisir l’algorithme qui convient le mieux Ă  leur problĂšme ainsi que les paramĂštres associĂ©s; et d’autre part, un environnement pour les experts du domaine leur permettant de comparer efficacement des algorithmes et de dĂ©finir dynamiquement de nouveaux scĂ©narios d’utilisation. Ces fonctionnalitĂ©s nĂ©cessitent de pouvoir exĂ©cuter les logiciels de rĂ©solution disponibles un grand nombre de fois,avec beaucoup de valeurs diffĂ©rentes des paramĂštres de contrĂŽle (et Ă©ventuellement sur plusieurs architectures de machines). Actuellement, seule la grille peut fournir la puissance de calcul pour ce type d’applications. L’intergiciel DIETest utilisĂ© pour gĂ©rer la grille, les diffĂ©rents services, et leur ordonnancement efficace
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