Now of course, if one limit itself to very regular applications (such as the one presented in the paper), where the matrices involved in the computation are well conditioned (such as in the paper), and if you only use MPI_DOUBLE (\cite{same_paper}), and finally if you only expect to run over slow Ethernet (1Gbs) (\cite{same_paper_again})... then yes one might get some benefit.
george. On Apr 22, 2008, at 9:03 AM, Tomas Ukkonen wrote:
Hello I read from somewhere that OpenMPI supports some kind of data compression but I couldn't find any information about it. Is this true and how it can be used? Does anyone have any experiences about using it? Is it possible to use compression in just some subset of communications (communicator specific compression settings)? In our MPI application we are transferring large amounts of sparse/redundant data that compresses very well. Also my initial tests showed significant improvements in performance. There are also articles that suggest that compression should be used [1]. [1] J. Ke, M. Burtcher and E. Speight. Runtime Compression of MPI Messages to Improve the Performance and Scalability of Parallel Applications. Thanks in advance, Tomas _______________________________________________ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users
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