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FYI - HDF5 doesn’t use this mechanism for type conversions between memory and a file. Nor does any other I/O library that I know of.
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<div>Also, searching on Github (https://github.com/search?p=2&q=MPI_Register_datarep&type=Code) is only turning up implementations of it and tests for it, as far as the first bunch of search results display. (But there’s 100 pages, so I haven’t looked at
all of them :-)
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<div><span class="Apple-tab-span" style="white-space:pre"></span>Quincey</div>
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<div>On Mar 3, 2023, at 8:26 AM, Jeff Hammond via mpi-forum <mpi-forum@lists.mpi-forum.org> wrote:</div>
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<div dir="ltr">I can't find these in the MPICH test suite or anywhere else on the internet, except in contexts where they are included because they are part of the MPI API.
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<div>These functions have been in MPI since 2.1, i.e. 2008. If there is no usage after 15 years, we should deprecate these functions. As best I can tell, they are nontrivial to implement, so their existence is a distraction for anyone wishing to apply their
creative energy to MPI I/O.</div>
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<div>Jeff<br clear="all">
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-- <br>
<div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Jeff Hammond<br>
<a href="mailto:jeff.science@gmail.com" target="_blank">jeff.science@gmail.com</a><br>
<a href="http://jeffhammond.github.io/" target="_blank">http://jeffhammond.github.io/</a></div>
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