<div dir="ltr"><div><div><div>Thanks a lot, Michael, Andreas, Simon, Doug,<br></div><div>I have already installed MLNX OFED 4:-(<br>I will now have to undo it and install the earlier version.<br></div><div><br></div>Roughly, by when would the support for MLNX OFED 4 be available?<br><br></div>Regards,<br><br><br></div>Indivar Nair<br><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 11, 2017 at 9:35 PM, Oucharek, Doug S <span dir="ltr"><<a href="mailto:doug.s.oucharek@intel.com" target="_blank">doug.s.oucharek@intel.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div style="overflow-wrap: break-word;">
The note regarding MOFED 4 not supported by Lustre: I’m working on it. MOFED 4 did not drop support of Lustre, but did make API/behaviour changes which Lustre has not fully adapted to yet. The ball is in the Lustre community’s court on this one now.
<span class="gmail-HOEnZb"><font color="#888888"><div><br>
</div>
<div>Doug</div></font></span><div><div class="gmail-h5">
<div><br>
<div>
<blockquote type="cite">
<div>On May 11, 2017, at 8:47 AM, Simon Guilbault <<a href="mailto:simon.guilbault@calculquebec.ca" target="_blank">simon.guilbault@calculquebec.<wbr>ca</a>> wrote:</div>
<br class="gmail-m_-5778260983002475721Apple-interchange-newline">
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<div>Hi, your lnet.conf look fine, I tested lnet with RoCE V2 a while back with a pair of server using Connectx4 with a single 25Gb interface and RDMA was working with Centos 7.3, stock RHEL OFED and Lustre 2.9. The only settings that I had to use
in lustre's config was this one:</div>
<div><br>
</div>
<div>options lnet networks=o2ib(ens2)</div>
</div>
<div><br>
</div>
<div>The performance was about the same (1.9GB/s) without any tuning with the lnet self-test but the CPU utilisation was a lot lower with RDMA than TCP (3% vs 65% of a core). </div>
<div><br>
</div>
<div>From my notes I took back then Lustre needed to be recompiled with MLNX OFED 3.4 and MLNX OFED 4 dropped support of Lustre accordings to their release notes.</div>
<div><br>
</div>
<div>Ref 965588</div>
<div><a href="https://www.mellanox.com/related-docs/prod_software/Mellanox_OFED_Linux_Release_Notes_4_0-2_0_0_1.pdf" target="_blank">https://www.mellanox.com/<wbr>related-docs/prod_software/<wbr>Mellanox_OFED_Linux_Release_<wbr>Notes_4_0-2_0_0_1.pdf</a><br>
</div>
<div><a href="https://www.mellanox.com/related-docs/prod_software/Mellanox_OFED_Linux_Release_Notes_4_0-2_0_2_0.pdf" target="_blank">https://www.mellanox.com/<wbr>related-docs/prod_software/<wbr>Mellanox_OFED_Linux_Release_<wbr>Notes_4_0-2_0_2_0.pdf</a><br>
</div>
<div><br>
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<br>
<div class="gmail_quote">On Thu, May 11, 2017 at 11:34 AM, Indivar Nair<span class="gmail-m_-5778260983002475721Apple-converted-space"> </span><span dir="ltr"><<a href="mailto:indivar.nair@techterra.in" target="_blank">indivar.nair@techterra.<wbr>in</a>></span><span class="gmail-m_-5778260983002475721Apple-converted-space"> </span>wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div>
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<div>So I should add something like this in lnet.conf -<br>
<br>
</div>
options lnet networks=o2ib0(p4p1)<br>
<br>
</div>
Thats it, right?<br>
<br>
</div>
Regards,<br>
<br>
<br>
</div>
Indivar Nair<br>
</div>
<div class="gmail-m_-5778260983002475721HOEnZb">
<div class="gmail-m_-5778260983002475721h5">
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, May 11, 2017 at 8:39 PM, Dilger, Andreas<span class="gmail-m_-5778260983002475721Apple-converted-space"> </span><span dir="ltr"><<a href="mailto:andreas.dilger@intel.com" target="_blank">andreas.dilger@intel.<wbr>com</a>></span><span class="gmail-m_-5778260983002475721Apple-converted-space"> </span>wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
If you have RoCE cards and configure them with OFED, and configure Lustre to use o2iblnd then it should use RDMA for those interfaces. The fact that they are RoCE cards is hidden below OFED.<br>
<br>
Cheers, Andreas<br>
<div>
<div class="gmail-m_-5778260983002475721m_-2019842202792000363h5"><br>
> On May 11, 2017, at 08:36, Indivar Nair <<a href="mailto:indivar.nair@techterra.in" target="_blank">indivar.nair@techterra.in</a>> wrote:<br>
><br>
> Hi ...,<br>
><br>
> I have read in different forums and blogs that Lustre supports RoCE.<br>
> But I cant find any documentation on it.<br>
><br>
> I have a Lustre setup with 6 OSS and 2 SMB/NFS Gateways.<br>
> They are all interconnected using Mellanox SN2700 100G Switch and Mellanox Connect-X4 100G NICs.<br>
> I have installed the Mellanox OFED Drivers, but I cant find a way to tell Lustre / LNET to use RoCE.<br>
><br>
> How do I go about?<br>
><br>
> Regards,<br>
><br>
><br>
> Indivar Nair<br>
><br>
><br>
</div>
</div>
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