<div class="socmaildefaultfont" dir="ltr" style="font-family:Arial, Helvetica, sans-serif;font-size:12pt" ><div dir="ltr" >Are you able to explain why you want to check for stale file handles? Are you attempting to detect failures of some sort, and why do the existing mechanisms in GPFS not provide the functionality you require?</div>
<div dir="ltr" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial, Helvetica, sans-serif;font-size:10.5pt" ><div dir="ltr" ><br><font size="2" face="Default Sans Serif,Verdana,Arial,Helvetica,sans-serif" ><span style="font-size:1.143em;" >Fred<br>__________________________________________________<br>Fred Stock | IBM Pittsburgh Lab | 720-430-8821<br>stockf@us.ibm.com</span></font></div></div></div>
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<blockquote data-history-content-modified="1" dir="ltr" style="border-left:solid #aaaaaa 2px; margin-left:5px; padding-left:5px; direction:ltr; margin-right:0px" >----- Original message -----<br>From: Alexander John Mamach <alex.mamach@northwestern.edu><br>Sent by: gpfsug-discuss-bounces@spectrumscale.org<br>To: "gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org><br>Cc:<br>Subject: [EXTERNAL] [gpfsug-discuss] Checking for Stale File Handles<br>Date: Fri, Aug 9, 2019 1:46 PM<br> <br><!--Notes ACF
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<div><p style="margin: 0px;" >Hi folks,</p>
<p style="margin: 0px;" ><o:p> </o:p></p>
<p style="margin: 0px;" >We\u2019re 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.</p>
<p style="margin: 0px;" ><o:p> </o:p></p>
<p style="margin: 0px;" >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.</p>
<p style="margin: 0px;" ><o:p> </o:p></p>
<p style="margin: 0px;" >Thanks,</p>
<p style="margin: 0px;" ><o:p> </o:p></p>
<p style="margin: 0px;" >Alex</p>
<p style="margin: 0px;" ><o:p> </o:p></p>
<p style="margin: 0px;" >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>www.it.northwestern.edu</p>
<p style="margin: 0px;" ><o:p> </o:p></p></div>
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