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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Dynamic LNet configuration (DLC) must be used to configure multi-rail. Lustre 2.10 contains an “lnet.conf” file that has a sample multi-rail configuration. I’ve copied it below for your
convenience.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # lnet.conf - configuration file for lnet routes to be imported by lnetctl<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> #<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # This configuration file is formatted as YAML and can be imported<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # by lnetctl.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> #<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # net:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - net type: o2ib1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # local NI(s):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - nid: 172.16.1.4@o2ib1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # interfaces:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # 0: ib0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # tunables:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer_timeout: 180<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer_credits: 128<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer_buffer_credits: 0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # credits: 1024<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # lnd tunables:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peercredits_hiw: 64<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # map_on_demand: 32<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # concurrent_sends: 256<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # fmr_pool_size: 2048<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # fmr_flush_trigger: 512<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # fmr_cache: 1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # CPT: "[0,1]"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - nid: 172.16.2.4@o2ib1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # interfaces:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # 0: ib1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # tunables:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer_timeout: 180<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer_credits: 128<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer_buffer_credits: 0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # credits: 1024<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # lnd tunables:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peercredits_hiw: 64<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # map_on_demand: 32<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # concurrent_sends: 256<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # fmr_pool_size: 2048<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # fmr_flush_trigger: 512<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # fmr_cache: 1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # CPT: "[0,1]"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # route:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - net: o2ib<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # gateway: 172.16.1.1@o2ib1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # hop: -1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # priority: 0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - primary nid: 192.168.1.2@o2ib<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # Multi-Rail: True<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer ni:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - nid: 192.168.1.2@o2ib<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - nid: 192.168.2.2@o2ib<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - primary nid: 172.16.1.1@o2ib1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # Multi-Rail: True<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # peer ni:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - nid: 172.16.1.1@o2ib1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">> # - nid:
<a href="mailto:172.16.2.1@o2ib1">172.16.2.1@o2ib1</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Chris Horn<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black">lustre-discuss <lustre-discuss-bounces@lists.lustre.org> on behalf of Riccardo Veraldi <Riccardo.Veraldi@cnaf.infn.it><br>
<b>Date: </b>Monday, August 28, 2017 at 5:49 PM<br>
<b>To: </b>"lustre-discuss@lists.lustre.org" <lustre-discuss@lists.lustre.org><br>
<b>Subject: </b>[lustre-discuss] Lustre 2.10.0 multi rail configuration<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">Hello,<br>
I am trying to deploy a multi rail configuration on Lustre 2.10.0 on RHEL73.<br>
My goal is to use both the IB interfaces on OSSes and client.<br>
I have one client and two OSSes and 1 MDS<br>
My LNet network is labelled o2ib5 and tcp5 just for my own convenience. What I did is to modify the configuration of lustre.conf<br>
<br>
options lnet networks=o2ib5(ib0,ib1),tcp5(enp1s0f0)<br>
<br>
lctl list_nids on either hte OSSes or the client shows me both local IB interfaces:<br>
<br>
<b>172.21.52.86@o2ib5<br>
172.21.52.118@o2ib5</b><br>
172.21.42.211@tcp5<o:p></o:p></p>
<p>anyway I can't run a LNet selftest using the new nids, it fails.<o:p></o:p></p>
<p class="MsoNormal">Seems like they are unused.<br>
Any hint on the multi-rail configuration needed?<br>
What I'd like to do is use both InfiniBand cards (ib0,ib1) on my two OSSes and on my client to leverage more bandwidth usage<br>
since with only one InfiniBand I cannot saturate the disk performance.<br>
thank you <o:p></o:p></p>
<p><o:p> </o:p></p>
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