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Hi, Jim
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<div>Can your provide the test program and the file header dumped by "ncdump -h", if that is available?</div>
<div>Also, what machine was used in the tests and its the parallel file system configuration is?</div>
<div>These can help diagnose.</div>
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<div>Wei-keng </div>
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<div>On Aug 4, 2023, at 8:49 AM, Jim Edwards <jedwards@ucar.edu> wrote:</div>
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I am using ncmpi_iput_varn and ncmpi_wait_all to write output from my model. I have a test program that does nothing but test the
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performance of the write operation. Attached is a plot of performance in the model and in the standalone application. I'm looking for
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clues as to why the model performance is scaling so badly with the number of variables but the standalone program performance is fine.
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<div>Jim Edwards<br>
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<font size="1">CESM Software Engineer<br>
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<font size="1">National Center for Atmospheric Research<br>
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<font size="1">Boulder, CO</font> <br>
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<span id="cid:f_lkwn4kse0"><Screenshot 2023-07-27 at 11.49.03 AM.png></span></div>
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