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I take back one thing I mentioned in my talk in Atlanta. I think I said that Lustre striping does not really influence the read performance. With my latest results in hand, I must point out this is not true. I might have been confused by some former Piz Daint
Lustre performance issues and/or HDF5 library issues I mentioned.
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<div class="">Here are my latest slides from PASC19.</div>
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<div><a href="https://polybox.ethz.ch/index.php/s/PPZLSyZOKo3UXPS" class="">https://polybox.ethz.ch/index.php/s/PPZLSyZOKo3UXPS</a></div>
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<div class="">On slide 18, there is some comparison for different stripe settings. I can now see a speed-up of ~4 for 1 vs 12 stripes (which is actually the number of cores per node) for the mesh with 128M elements. The times are very similar for 8 and 64 computation
nodes.</div>
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<div class="">Toby, could you maybe forward this message to the meeting attendees? I don't want to leave anybody confused.</div>
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<div class="">Thanks,</div>
<div class="">Vaclav</div>
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