Changes between Version 10 and Version 11 of PDAD_Performance


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Timestamp:
Jan 14, 2010, 3:35:23 PM (14 years ago)
Author:
cristina.basescu
Comment:

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  • PDAD_Performance

    v10 v11  
    4646
    4747We didn't test the applications for MPI as the jobs in Hadoop took a really long time and we considered them more challenging. However, in out applications we ''assumed'' that the data was somehow present on all slaves, which in practice is not true. Consequently, we think MPI needs and underlying distributed file system, like NFS, to do things properly.
    48 
    49 From a portability point of view, Hadoop passes the test. We cannot say the same about MPI, which is highly dependend on the runtime system underneath. For example, the proper asynchronous message sending level deppends on the buffers used by the RTS. Also some MPI implementations may offer things others lack.
    50 
    51 Its interesting to discuss productivity