<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<p><font face="monospace">Hallo,</font></p>
<p><font face="monospace">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:</font></p>
<p><font face="monospace">* is there a reason for such default
value? If we change it, are there unpleasant effects we could
see?</font></p>
<p><font face="monospace">* 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 [**]</font></p>
<p><font face="monospace">* what happens if we actually remove the
Filesytem_Id parameter from gpfs.ganesha.exports.conf?</font></p>
<p><font face="monospace">* 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)?</font></p>
<p><font face="monospace">Thanks a lot!</font></p>
<p><font face="monospace">cheers</font></p>
<p><font face="monospace">leo<br>
</font></p>
<p><font face="monospace"><br>
</font></p>
<p><font face="monospace">[*]
<a class="moz-txt-link-freetext" href="https://www.ibm.com/docs/en/storage-scale/5.0.4?topic=exports-making-bulk-changes-nfs">https://www.ibm.com/docs/en/storage-scale/5.0.4?topic=exports-making-bulk-changes-nfs</a></font></p>
<p><font face="monospace">[**]
<a class="moz-txt-link-freetext" href="https://github.com/nfs-ganesha/nfs-ganesha/issues/615">https://github.com/nfs-ganesha/nfs-ganesha/issues/615</a></font><br>
</p>
<pre class="moz-signature" cols="72">--
Paul Scherrer Institut
Dr. Leonardo Sala
Group Leader Data Analysis and Research Infrastructure
Deputy Department Head a.i Science IT Infrastructure and Services department
Science IT Infrastructure and Services department (AWI)
WHGA/036
Forschungstrasse 111
5232 Villigen PSI
Switzerland
Phone: +41 56 310 3369
<a class="moz-txt-link-abbreviated" href="mailto:leonardo.sala@psi.ch">leonardo.sala@psi.ch</a>
<a class="moz-txt-link-abbreviated" href="http://www.psi.ch">www.psi.ch</a></pre>
</body>
</html>