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An addendum, it's possible my "bugfix" as detailed in https: //github. com/pmodels/mpich/issues/7452 might not be enough. I have a code that uses `MPI_Info_set` to, well, set infos and I can't seem to affect the fs type. First I set: </div>
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<p class="MsoNormal"><span style="font-family:Consolas">An addendum, it's possible my "bugfix" as detailed in
<a href="https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues/7452__;!!G_uCfscf7eWS!aqjYcygbr3I8ZbKEHR9uOfQmiIa7WR2lVajdfRCYksA9leIz6X8t0pUZ9m8BzT8XyErKAf5BrG_M2fsmgucN-O7Wg10$">https://github.com/pmodels/mpich/issues/7452</a> might not be enough.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">I have a code that uses `MPI_Info_set` to, well, set infos and I can't seem to affect the fs type.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">First I set:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"> export ROMIO_PRINT_HINTS=1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">and then in my code I added:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"> call MPI_INFO_SET(info,"romio_filesystem_type","QUOBYTEFS:", status)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">but, well:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"> key = romio_filesystem_type value = UFS: Generic ROMIO driver for all UNIX-like file systems<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">I also tried it in lowercase as well. No joy.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">I've also tried:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"> export ROMIO_FSTYPE_FORCE="QUOBYTEFS:"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">and:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"> export ROMIO_FSTYPE_FORCE="quobytefs:"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">but in each case, it's still UFS. I do know my Infos are being seen by MPICH because if I toggled:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"> call MPI_INFO_SET(info,"romio_cb_write","enable", status)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">from enable to disable, the ROMIO_PRINT_HINTS show the change.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">Matt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:12.65pt"><b><span style="font-size:11.0pt;font-family:Helvetica;color:black">Matt Thompson</span></b><span style="font-size:11.0pt;font-family:Helvetica;color:#212121"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.65pt"><b><span style="font-size:9.0pt;font-family:Helvetica;color:black">Lead Scientific Software Engineer/Supervisor</span></b><span style="font-size:11.0pt;font-family:Helvetica;color:#212121"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.65pt"><span style="font-size:9.0pt;font-family:Helvetica;color:#212121">Global Modeling and Assimilation Office<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.65pt"><span style="font-size:9.0pt;font-family:Helvetica;color:#212121">Science Systems and Applications, Inc.
<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.65pt"><span style="font-size:9.0pt;font-family:Helvetica;color:#212121">Code 610.1, 8800 Greenbelt Rd, Greenbelt, MD 20771<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.65pt"><span style="font-size:9.0pt;font-family:Helvetica;color:black">o: 301-614-6712</span><span style="font-size:11.0pt;font-family:Helvetica;color:#212121">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Helvetica;color:#212121"><a href="mailto:matthew.thompson@nasa.gov">matthew.thompson@nasa.gov</a></span><span style="font-size:11.0pt;font-family:Helvetica;color:#212121"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC] via discuss <discuss@mpich.org><br>
<b>Date: </b>Wednesday, June 11, 2025 at 9:37</span><span style="font-family:"Arial",sans-serif;color:black"> </span><span style="color:black">AM<br>
<b>To: </b>discuss@mpich.org <discuss@mpich.org><br>
<b>Cc: </b>Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC] <matthew.thompson@nasa.gov><br>
<b>Subject: </b>[EXTERNAL] [BULK] [mpich-discuss] How to make/run romio tests?<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">All, I'm trying to do some tests on a Quobyte system and we've seen confusing file write timings with Intel MPI and Open MPI. So, a bit of googling seeing if some
MPI stack has a mention of Quobyte turns up: https:</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">//www.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">quobyte.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">com/blog/quobyte-mpi-io-support-with-kernel-bypass-now-available/<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Consolas">All,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">I'm trying to do some tests on a Quobyte system and we've seen confusing file write timings with Intel MPI and Open MPI. So, a bit of googling seeing if some MPI stack has a mention of Quobyte turns up:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"><a href="https://urldefense.us/v3/__https://www.quobyte.com/blog/quobyte-mpi-io-support-with-kernel-bypass-now-available/__;!!G_uCfscf7eWS!foSdMay5QSiTxv1dePpWE5p5EOqkyr5hGLVXtgYBy6sY2_p9bErxn31S50_D4xpBCr1CIJCYqJV6YIlpDH99oVGEJLU$">https://www.quobyte.com/blog/quobyte-mpi-io-support-with-kernel-bypass-now-available/</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">and, yep, quobyte seems to be in MPICH! I grabbed MPICH 4.3.0 and built it (with one bug fix[1]) and well, it seems to run Hello World.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">So, following that Quobyte page, I get to Step 10 and tried the romio tests and...I am apparently dumb. I went to my
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> build/src/mpi/romio/test</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">directory and I see 'runtests' there, but:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> > ./runtests</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> make: *** No rule to make target 'default'. Stop.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">I also tried with -fname and:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">> ./runtests -fname=quobyte:test_mpi_file</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">./runtests: line 90: [quobyte:test_mpi_file: command not found</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">make: *** No rule to make target 'default'. Stop.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">> ./runtests -fname=quobyte:/home/mathomp4/MPI/src/mpich-4.3.0/build-ifort-2021.13/src/mpi/romio/test/test_mpi_file</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">./runtests: line 90: [quobyte:/home/mathomp4/MPI/src/mpich-4.3.0/build-ifort-2021.13/src/mpi/romio/test/test_mpi_file: No such file or directory</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">make: *** No rule to make target 'default'. Stop.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">Yeah. I'm stumped. I'm guessing I've missed some simple step along the way.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">NOTE: I have no idea even how to use romio really, but I was hoping the tests could, well, help me figure that out.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">Thanks for any help,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">Matt</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">[1] See <a href="https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues/7452__;!!G_uCfscf7eWS!foSdMay5QSiTxv1dePpWE5p5EOqkyr5hGLVXtgYBy6sY2_p9bErxn31S50_D4xpBCr1CIJCYqJV6YIlpDH99XaSWwF0$">
https://github.com/pmodels/mpich/issues/7452</a></span><o:p></o:p></p>
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<p class="MsoNormal" style="line-height:12.65pt"><b><span style="font-size:11.0pt;font-family:Helvetica;color:black">Matt Thompson</span></b><o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.65pt"><b><span style="font-size:9.0pt;font-family:Helvetica;color:black">Lead Scientific Software Engineer/Supervisor</span></b><o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.65pt"><span style="font-size:9.0pt;font-family:Helvetica;color:#212121">Global Modeling and Assimilation Office</span><o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.65pt"><span style="font-size:9.0pt;font-family:Helvetica;color:#212121">Science Systems and Applications, Inc.
</span><o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.65pt"><span style="font-size:9.0pt;font-family:Helvetica;color:#212121">Code 610.1, 8800 Greenbelt Rd, Greenbelt, MD 20771</span><o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.65pt"><span style="font-size:9.0pt;font-family:Helvetica;color:black">o: 301-614-6712</span><span style="font-size:11.0pt;font-family:Helvetica;color:#212121">
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Helvetica;color:#212121"><a href="mailto:matthew.thompson@nasa.gov">matthew.thompson@nasa.gov</a></span><o:p></o:p></p>
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