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<p>Thanks for the quick response Alex... There's no problem yet... It's a new install with 100GbE Mellanox IB and currently at defaults except I bumped the number of NFS daemons to 128. Just researching ways to optimize performance for 36 nodes concurrently
accessing the storage server. It is my understanding that setting MTU to 9000 is recommended but that seems to be applicable for 10GbE.<br>
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<p>Regards,<br>
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John McCulloch | PCPC Direct, Ltd.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font color="#000000" face="Calibri, sans-serif" style="font-size:11pt"><b>From:</b> Alex Chekholko <alex@calicolabs.com><br>
<b>Sent:</b> Friday, June 12, 2020 3:53 PM<br>
<b>To:</b> John McCulloch<br>
<b>Cc:</b> beowulf@beowulf.org<br>
<b>Subject:</b> Re: [Beowulf] NFS over IPoIB</font>
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<div dir="ltr">I think you should start with all defaults and then describe the problem you're having with those settings. IIRC last time I ran NFS over IPoIB I didn't tune anything and it was fine.</div>
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<div class="gmail_attr" dir="ltr">On Fri, Jun 12, 2020 at 12:10 PM John McCulloch <<a href="mailto:johnm@pcpcdirect.com">johnm@pcpcdirect.com</a>> wrote:<br>
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<p>Can anyone comment on experience with compute nodes mounting NFS v4.1 shares over IPoIB… i.e., tuning parameters that are likely to be most effective... We looked at NFS over RDMA but doing that would require a kernel upgrade...<br>
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<p><a href="https://www.admin-magazine.com/HPC/Articles/Useful-NFS-Options-for-Tuning-and-Management" target="_blank">https://www.admin-magazine.com/HPC/Articles/Useful-NFS-Options-for-Tuning-and-Management</a></p>
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<p>Cheers,<br>
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<div name="divtagdefaultwrapper">John McCulloch | PCPC Direct, Ltd.<br>
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