Titlebook: Recent Advances in Parallel Virtual Machine and Message Passing Interface; 11th European PVM/MP Dieter Kranzlmüller,Péter Kacsuk,Jack Donga

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Tools and Services for Interactive Applications on the Grid – The CrossGrid Tutorialesentations and training exercises prepared to familiarize the user with the area of Grid computing being researched by the CrossGrid. We present tools aimed at both users and Grid application developers. The exercises cover many subjects, from user-friendly utilities for handling Grid jobs, through

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Verifying Collective MPI Callsls to provide consistent parameters, eg. a unique root process, matching type signatures and amounts for data to be exchanged, or same operator. Under normal use of MPI such exhaustive consistency checks are typically too expensive to perform and would compromise optimizations for high performance i

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Fast Tuning of Intra-cluster Collective CommunicationsWe believe that intra-cluster collective communications should also be optimised, as a way to improve the overall efficiency and to allow the construction of multi-level collective operations. Indeed, inside homogeneous clusters, a simple optimisation approach rely on the comparison from different i

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Zero-Copy MPI Derived Datatype Communication over InfiniBandes the gather/scatter feature provided by InfiniBand channel semantics. It takes advantage of the capability of processing non-contiguity on both send and receive sides in the Send Gather and Receive Scatter operations. In this paper, we describe the design, implementation and evaluation of this new

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Efficient Implementation of MPI-2 Passive One-Sided Communication on InfiniBand Clusterseveral requirements for synchronization in passive one-sided communication. Based on these requirements, we present four design alternatives, which can be classified into two categories: thread-based and atomic operation-based. In thread-based designs, synchronization is achieved with the help of ex

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The Impact of File Systems on MPI-IO Scalabilityperformance. While scalable algorithms have been applied successfully in some areas of parallel I/O, many operations are still performed in an uncoordinated manner. In this work we consider, in three file system scenarios, the possibilities for applying scalable algorithms to the many operations tha

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