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<p class="MsoNormal">Anything in dmesg? We need to know _<i>why</i>_ the network failed to start.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Chris Horn<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">Kurt Strosahl <strosahl@jlab.org><br>
<b>Date: </b>Wednesday, October 2, 2019 at 1:55 PM<br>
<b>To: </b>Chris Horn <hornc@cray.com>, "lustre-discuss@lists.lustre.org" <lustre-discuss@lists.lustre.org><br>
<b>Subject: </b>Re: [lustre-discuss] Lustre rpm install creating a file that breaks lustre<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">the lnet modules load, but when I start the lnet service it says that the network is down. I backed everything out, removed the file, and then started the lnet service again and it worked properly.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> Chris Horn <hornc@cray.com><br>
<b>Sent:</b> Wednesday, October 2, 2019 2:48 PM<br>
<b>To:</b> Kurt Strosahl <strosahl@jlab.org>; lustre-discuss@lists.lustre.org <lustre-discuss@lists.lustre.org><br>
<b>Subject:</b> [EXTERNAL] Re: [lustre-discuss] Lustre rpm install creating a file that breaks lustre</span>
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<p class="xmsonormal">Might be best to open a ticket for this. What was the nature of the failure?
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<p class="xmsonormal"> <o:p></o:p></p>
<p class="xmsonormal">Chris Horn<o:p></o:p></p>
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<p class="xmsonormal"><b><span style="font-size:12.0pt;color:black">From: </span>
</b><span style="font-size:12.0pt;color:black">lustre-discuss <lustre-discuss-bounces@lists.lustre.org> on behalf of Kurt Strosahl <strosahl@jlab.org><br>
<b>Date: </b>Wednesday, October 2, 2019 at 1:30 PM<br>
<b>To: </b>"lustre-discuss@lists.lustre.org" <lustre-discuss@lists.lustre.org><br>
<b>Subject: </b>[lustre-discuss] Lustre rpm install creating a file that breaks lustre</span><o:p></o:p></p>
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<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black">Good Afternoon,</span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black"> </span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black"> While getting lustre 2.10.8 running on a RHEL 7.7 system I found that the RPM install was putting a file in /etc/modprobe.d that was preventing lnet from starting properly.</span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black"> </span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black">the file is ko2iblnd.conf, which contains the following...</span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black"> </span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black">alias ko2iblnd-opa ko2iblnd</span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black">options ko2iblnd-opa peer_credits=128 peer_credits_hiw=64 credits=1024 concurrent_sends=256 ntx=2048 map_on_demand=32 fmr_pool_size=2048 fmr_flush_trigger=512 fmr_cache=1 conns_per_peer=4</span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black"> </span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black">install ko2iblnd /usr/sbin/ko2iblnd-probe</span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black"> </span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black">Our system is running infiniband, not omnipath. So I'm mot sure why this file is being put in place. Removing the file allows lnet to start properly.</span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black"> </span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:12.0pt;color:black">w/r,</span><o:p></o:p></p>
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<p><span style="font-size:10.5pt;font-family:"Courier New";color:#333333">Kurt J. Strosahl<br>
System Administrator: Lustre, HPC<br>
Scientific Computing Group, Thomas Jefferson National Accelerator Facility</span><o:p></o:p></p>
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