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<p class="MsoNormal"><span style="font-size:11.0pt">I vaguely recall seeing this and testing it. My notes to myself say: ‘As long as the export_id is unique, you are fine.’ See the manuals, ganesha loves Camel Case so it’s more than likely actually “Export_Id”
or some such. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Ed Wahl<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Ohio Supercomputer Center<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt">From:</span></b><span style="font-size:11.0pt"> gpfsug-discuss <gpfsug-discuss-bounces@gpfsug.org>
<b>On Behalf Of </b>Leonardo Sala<br>
<b>Sent:</b> Tuesday, June 27, 2023 10:18 AM<br>
<b>To:</b> gpfsug-discuss@spectrumscale.org<br>
<b>Subject:</b> [gpfsug-discuss] CES, Ganesha, and Filesystem_id<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">Hallo, we are checking our current CES configuration, and we noticed that by default GPFS puts always Filesystem_Id=666. 666 [*], no matter which Export_Id value
the export has. To my understanding (which is poor!), this means that all clients
<o:p></o:p></span></p>
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<p><span style="font-family:"Courier New"">Hallo,</span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">we are checking our current CES configuration, and we noticed that by default GPFS puts always Filesystem_Id=666.666 [*], no matter which Export_Id value the export has. To my understanding (which is poor!), this means
that all clients will see all our exports (~20) with the same device number, creating various possible issues (e.g. file state handles). Questions:</span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">* is there a reason for such default value? If we change it, are there unpleasant effects we could see?</span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">* what would be a reasonable value? Looking around I saw that Filesystem_Id = Export_Id.Export_Id is quite common, with the possible issue of using the forbidden 152.152 [**]</span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">* what happens if we actually remove the Filesytem_Id parameter from gpfs.ganesha.exports.conf?</span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">* is there a way to modify Filesystem_Id in gpfs.ganesha.exports.conf without editing the file, eg using mmnfs commands (seems not, but I might be mistaken)?</span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">Thanks a lot!</span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">cheers</span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">leo</span><o:p></o:p></p>
<p><o:p> </o:p></p>
<p><span style="font-family:"Courier New"">[*] <a href="https://urldefense.com/v3/__https:/www.ibm.com/docs/en/storage-scale/5.0.4?topic=exports-making-bulk-changes-nfs__;!!KGKeukY!2ZoLSJiACv5XMmk6G9XTy958E9yslS6wIGqy1RaI3D0d_6hraQHFRLCEBCWh73texj92o7WDULi105hTHXqh$">
https://www.ibm.com/docs/en/storage-scale/5.0.4?topic=exports-making-bulk-changes-nfs</a></span><o:p></o:p></p>
<p><span style="font-family:"Courier New"">[**] <a href="https://urldefense.com/v3/__https:/github.com/nfs-ganesha/nfs-ganesha/issues/615__;!!KGKeukY!2ZoLSJiACv5XMmk6G9XTy958E9yslS6wIGqy1RaI3D0d_6hraQHFRLCEBCWh73texj92o7WDULi10-6QZN1l$">
https://github.com/nfs-ganesha/nfs-ganesha/issues/615</a></span><o:p></o:p></p>
<pre>-- <o:p></o:p></pre>
<pre>Paul Scherrer Institut<o:p></o:p></pre>
<pre>Dr. Leonardo Sala<o:p></o:p></pre>
<pre>Group Leader Data Analysis and Research Infrastructure<o:p></o:p></pre>
<pre>Deputy Department Head a.i Science IT Infrastructure and Services department<o:p></o:p></pre>
<pre>Science IT Infrastructure and Services department (AWI)<o:p></o:p></pre>
<pre>WHGA/036<o:p></o:p></pre>
<pre>Forschungstrasse 111<o:p></o:p></pre>
<pre>5232 Villigen PSI<o:p></o:p></pre>
<pre>Switzerland<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Phone: +41 56 310 3369<o:p></o:p></pre>
<pre><a href="mailto:leonardo.sala@psi.ch">leonardo.sala@psi.ch</a><o:p></o:p></pre>
<pre><a href="https://urldefense.com/v3/__http:/www.psi.ch__;!!KGKeukY!2ZoLSJiACv5XMmk6G9XTy958E9yslS6wIGqy1RaI3D0d_6hraQHFRLCEBCWh73texj92o7WDULi105e6ItOo$">www.psi.ch</a><o:p></o:p></pre>
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