Grid'5000 user report for Thierry Garcia

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Thierry Garcia (users, user, toulouse, ml-users user)
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  • Problem of continuous flow electrophoresis (Programming) [in progress]
    Description: This work deals with the implementation on the Grid'5000 network of parallel simulations for the solution of a 3D coupled boundary value problem of continuous flow electrophoresis which is governed by Navier Stokes equations coupled with convection-diffusion and potential equations. The coupled boundary value problems are discretised by appropriate schemes involving the convergence of parallel synchronous and asynchronous Schwarz alternating algorithms. Finally, parallel experiments on grid computing are presented and analysed.
    Results: Due to the fact that the algebraic systems to solve are very ill-conditioned and also that the computational time is very high, this kind of problem is very difficult to solve by sequential algorithms. So parallel computation, more particularly on Grid platform is an appropriate way to solve this complex problem. Due to the weight of synchronizations, parallel asynchronous experiments show clearly as well as on local cluster or on distant clusters the interest of such methods.
  • Asynchronous peer-to-peer distributed computing for financial applications (Programming) [in progress]
    Description: This work deals with the numerical solution of financial applications, more specifically the computation of American and European options derivatives modelled by boundary values problems. In such applications we have to solve large-scale algebraic linear systems. We concentrate on synchronous and asynchronous parallel iterative algorithms carried out on peer-to-peer networks. The properties of the operators arising in the discretized problem ensure the convergence of the parallel iterative synchronous and asynchronous algorithms. Computational experiments performed on peer-to-peer networks carried out on Grid'5000 are presented and analyzed.
    Results: It follows from the computational experiments that the choice of communication mode (synchronous or asynchronous) has important impact on the efficiency of the distributed methods. The computational results show that the use of P2PDC carried out on the Grid'5000 platform permits one to obtain good efficiency, particularly when the number of processors is large except for the synchronous method when the number of processors is greater or equal to 64. Moreover, using parallel iterative asynchronous methods, compared to the synchronous ones, is well adapted to the use of heterogeneous and distant distributed large number of machines.



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    last update: 2011-12-06 23:17:41

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