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<p class="MsoNormal"><span style="color:#1F497D">You might try something like:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">timeout --kill-after=5 --signal=SIGKILL 5 test -d /some/folder/on/gpfs<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black"><img width="111" height="25" id="Picture_x0020_1" src="cid:image001.png@01D54EB2.C7C99600" alt="cid:image001.png@01D22319.C7D5D540"></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#595959">Roger Moye<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#595959">HPC Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#595959">713.425.6236 Office<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#595959"><o:p> </o:p></span></p>
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</span><span style="font-size:10.0pt;color:#595959">Financial, LLC</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> gpfsug-discuss-bounces@spectrumscale.org [mailto:gpfsug-discuss-bounces@spectrumscale.org]
<b>On Behalf Of </b>Alexander John Mamach<br>
<b>Sent:</b> Friday, August 9, 2019 12:47 PM<br>
<b>To:</b> gpfsug-discuss@spectrumscale.org<br>
<b>Subject:</b> [gpfsug-discuss] Checking for Stale File Handles<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi folks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We’re currently investigating a way to check for stale file handles on the nodes across our cluster in a way that minimizes impact to the filesystem and performance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Has anyone found a direct way of doing so? We considered a few methods, including simply attempting to ls a GPFS filesystem from each node, but that might have false positives, (detecting slowdowns as stale file handles), and could negatively
impact performance with hundreds of nodes doing this simultaneously.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Alex<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Senior Systems Administrator<br>
<br>
Research Computing Infrastructure<br>
Northwestern University Information Technology (NUIT)<br>
<br>
2020 Ridge Ave<br>
Evanston, IL 60208-4311<br>
<br>
O: (847) 491-2219<br>
M: (312) 887-1881<br>
<a href="http://www.it.northwestern.edu">www.it.northwestern.edu</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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