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<p class="MsoNormal">Yes, but we’d upgraded all out HPC client nodes to 5.0.2-1 last week as well when this first happened …<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Unless it’s necessary to upgrade the NSD servers as well for this?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black"><gpfsug-discuss-bounces@spectrumscale.org> on behalf of "TOMP@il.ibm.com" <TOMP@il.ibm.com><br>
<b>Reply-To: </b>"gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org><br>
<b>Date: </b>Tuesday, 27 November 2018 at 19:48<br>
<b>To: </b>"gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org><br>
<b>Subject: </b>Re: [gpfsug-discuss] Hanging file-systems<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">"paging to disk" sometimes means mmap as well - there were several issues around that recently as well.</span><br>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Regards,<br>
<br>
Tomer Perry<br>
Scalable I/O Development (Spectrum Scale)<br>
email: tomp@il.ibm.com<br>
1 Azrieli Center, Tel Aviv 67021, Israel<br>
Global Tel: +1 720 3422758<br>
Israel Tel: +972 3 9188625<br>
Mobile: +972 52 2554625<br>
</span><br>
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<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">From: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">Skylar Thompson <skylar2@uw.edu></span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">To: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">gpfsug-discuss@spectrumscale.org</span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Date: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">27/11/2018 20:28</span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Subject: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">Re: [gpfsug-discuss] Hanging file-systems</span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Sent by: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">gpfsug-discuss-bounces@spectrumscale.org</span><o:p></o:p></p>
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<tt><span style="font-size:10.0pt">Despite its name, kswapd isn't directly involved in paging to disk; it's</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<tt>the kernel process that's involved in finding committed memory that can be</tt><br>
<tt>reclaimed for use (either immediately, or possibly by flushing dirty pages</tt><br>
<tt>to disk). If kswapd is using a lot of CPU, it's a sign that the kernel is</tt><br>
<tt>spending a lot of time to find free pages to allocate to processes.</tt><br>
<br>
<tt>On Tue, Nov 27, 2018 at 05:53:58PM +0000, Simon Thompson wrote:</tt><br>
<tt>> Thanks Sven ???</tt><br>
<tt>> </tt><br>
<tt>> We found a node with kswapd running 100% (and swap was off)???</tt><br>
<tt>> </tt><br>
<tt>> Killing that node made access to the FS spring into life.</tt><br>
<tt>> </tt><br>
<tt>> Simon</tt><br>
<tt>> </tt><br>
<tt>> From: <gpfsug-discuss-bounces@spectrumscale.org> on behalf of "oehmes@gmail.com" <oehmes@gmail.com></tt><br>
<tt>> Reply-To: "gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org></tt><br>
<tt>> Date: Tuesday, 27 November 2018 at 16:14</tt><br>
<tt>> To: "gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org></tt><br>
<tt>> Subject: Re: [gpfsug-discuss] Hanging file-systems</tt><br>
<tt>> </tt><br>
<tt>> 1. are you under memory pressure or even worse started swapping .</tt><br>
<br>
<tt>> _______________________________________________</tt><br>
<tt>> gpfsug-discuss mailing list</tt><br>
<tt>> gpfsug-discuss at spectrumscale.org</tt><br>
<tt>> </tt></span><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwICAg&c=jf_iaSHvJObTbx-siA1ZOg&r=mLPyKeOa1gNDrORvEXBgMw&m=sgaWNOJnHka2HBtMNNXBur4p2KbQ8q786tWza40tcLQ&s=CWkCUHu4-uwZQ6r1x_VFAGqQ5FFSBGXMSVa5t2pk424&e="><tt><span style="font-size:10.0pt">https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwICAg&c=jf_iaSHvJObTbx-siA1ZOg&r=mLPyKeOa1gNDrORvEXBgMw&m=sgaWNOJnHka2HBtMNNXBur4p2KbQ8q786tWza40tcLQ&s=CWkCUHu4-uwZQ6r1x_VFAGqQ5FFSBGXMSVa5t2pk424&e=</span></tt></a><span style="font-size:10.0pt;font-family:"Courier New""><br>
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<br>
<tt>-- </tt><br>
<tt>-- Skylar Thompson (skylar2@u.washington.edu)</tt><br>
<tt>-- Genome Sciences Department, System Administrator</tt><br>
<tt>-- Foege Building S046, (206)-685-7354</tt><br>
<tt>-- University of Washington School of Medicine</tt><br>
<tt>_______________________________________________</tt><br>
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