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<p>Hi, </p>
<p><br>
</p>
<p>I am facing a problem when trying to write on a Lustre filesystem ( v 2.12) using standard fortran IO </p>
<p>code ( compiled with GNU gfortran 8.3).<span style="font-size:12pt"> </span></p>
<p>The io rate sporadically goes extremely slow ( sometime down to 20/10 kBytes/s ! ) giving the</p>
<p>feeling that the job is just hanging.</p>
<p>Is this problem known by the community?</p>
<p>Is there something a user should be aware when using Fortran IO together with</p>
<p>the lustre filesystem?</p>
<p><br>
</p>
<p>The code (tarball in attachment) i am using is very simple and i would be grateful is somebody could</p>
<p>try it to see if this behaviour is a local or general problem.</p>
<p><br>
</p>
<p>Thanks in advance.</p>
<p>Denis</p>
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<div><span style="font-size:9pt">---------</span><span style="font-size:9pt"></span></div>
<div><span style="font-size:9pt">Denis Bertini</span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Abteilung: CIT</span><br>
<span style="font-size:9pt"></span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Ort: SB3 2.265a</span></div>
<span style="font-size:9pt"></span>
<div><br>
<span style="font-size:9pt"></span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Tel: +49 6159 71 2240</span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Fax: +49 6159 71 2986</span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">E-Mail: d.bertini@gsi.de</span></div>
<span style="font-size:9pt"></span>
<div><br>
<span style="font-size:9pt"></span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">GSI Helmholtzzentrum fr Schwerionenforschung GmbH</span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Planckstrae 1, 64291 Darmstadt, Germany, www.gsi.de</span></div>
<span style="font-size:9pt"></span>
<div><br>
<span style="font-size:9pt"></span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Commercial Register / Handelsregister: Amtsgericht Darmstadt, HRB 1528</span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Managing Directors / Geschftsfhrung:</span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Professor Dr. Paolo Giubellino, Dr. Ulrich Breuer, Jrg Blaurock</span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Chairman of the GSI Supervisory Board / Vorsitzender des GSI-Aufsichtsrats:</span></div>
<span style="font-size:9pt"></span>
<div><span style="font-size:9pt">Ministerialdirigent Dr. Volkmar Dietz</span></div>
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