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<p class="MsoNormal"><span lang="EN-US">Hello Douglas!<br>
Many thanks for your advice ! <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Well we are in a horrible situation regarding firmware and MOFED of old equipment
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Mellanox advised us to use a special version of subnetmanager 5.0-2.1.8.0 from MOFED
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I hope this helps<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;color:#3E3E3C;background:#FAFAF9"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;color:#3E3E3C;background:#FAFAF9"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;color:#3E3E3C;background:#FAFAF9">Let´s see how we can proceed
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Walter <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:DE-AT">From:</span></b><span lang="EN-US" style="mso-fareast-language:DE-AT"> gpfsug-discuss-bounces@spectrumscale.org <gpfsug-discuss-bounces@spectrumscale.org>
<b>On Behalf Of </b>Douglas O'flaherty<br>
<b>Sent:</b> Donnerstag, 9. Dezember 2021 17:04<br>
<b>To:</b> gpfsug-discuss@spectrumscale.org<br>
<b>Subject:</b> Re: [gpfsug-discuss] alternate path between ESS Servers for Datamigration<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Walter:</span><span style="font-size:10.0pt;mso-fareast-language:DE-AT"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Though not directly about your design, our work with NVIDIA on GPUdirect Storage and SuperPOD has shown how sensitive RDMA (IB & RoCE) to both MOFED and Firmware version compatibility can be. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">I would suggest anyone debugging RDMA issues should look at those closely. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Doug<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt"><br>
by carrier pigeon<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">On Dec 9, 2021, 5:04:36 AM, <a href="mailto:gpfsug-discuss-request@spectrumscale.org">
gpfsug-discuss-request@spectrumscale.org</a> wrote:<br>
<br>
From: <a href="mailto:gpfsug-discuss-request@spectrumscale.org">gpfsug-discuss-request@spectrumscale.org</a><br>
To: <a href="mailto:gpfsug-discuss@spectrumscale.org">gpfsug-discuss@spectrumscale.org</a><br>
Cc: <br>
Date: Dec 9, 2021, 5:04:36 AM<br>
Subject: [EXTERNAL] gpfsug-discuss Digest, Vol 119, Issue 5<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<pre>Send gpfsug-discuss mailing list submissions to <a href="mailto:gpfsug-discuss@spectrumscale.orgTo">gpfsug-discuss@spectrumscale.orgTo</a> subscribe or unsubscribe via the World Wide Web, visit <a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss">http://gpfsug.org/mailman/listinfo/gpfsug-discuss</a> or, via email, send a message with subject or body 'help' to <a href="mailto:gpfsug-discuss-request@spectrumscale.orgYou">gpfsug-discuss-request@spectrumscale.orgYou</a> can reach the person managing the list at <a href="mailto:gpfsug-discuss-owner@spectrumscale.orgWhen">gpfsug-discuss-owner@spectrumscale.orgWhen</a> replying, please edit your Subject line so it is more specificthan "Re: Contents of gpfsug-discuss digest..."<o:p></o:p></pre>
<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<pre>Send gpfsug-discuss mailing list submissions to <a href="mailto:gpfsug-discuss@spectrumscale.orgTo">gpfsug-discuss@spectrumscale.orgTo</a> subscribe or unsubscribe via the World Wide Web, visit <a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss">http://gpfsug.org/mailman/listinfo/gpfsug-discuss</a> or, via email, send a message with subject or body 'help' to <a href="mailto:gpfsug-discuss-request@spectrumscale.orgYou">gpfsug-discuss-request@spectrumscale.orgYou</a> can reach the person managing the list at <a href="mailto:gpfsug-discuss-owner@spectrumscale.orgWhen">gpfsug-discuss-owner@spectrumscale.orgWhen</a> replying, please edit your Subject line so it is more specificthan "Re: Contents of gpfsug-discuss digest..."Today's Topics: 1. alternate path between ESS Servers for Datamigration (Walter Sklenka)<o:p></o:p></pre>
<p class="MsoNormal"><span style="font-size:10.0pt;mso-fareast-language:DE-AT"><o:p> </o:p></span></p>
<p class="MsoNormal">Dear spectrum scale users!<o:p></o:p></p>
<p class="MsoNormal">May I ask you a design question?<o:p></o:p></p>
<p class="MsoNormal">We have an IB environment which is very mixed at the moment ( connecX3 … connect-X6 with FDR , even FDR10 and with arrive of ESS5000SC7 now also HDR100 and HDR switches. We still have some big troubles in this fabric when using RDMA ,
a case at Mellanox and IBM is open . <o:p></o:p></p>
<p class="MsoNormal">The environment has 3 old Building blocks 2xESSGL6 and 1x GL4 , from where we want to migrate the data to ess5000 , ( mmdelvdisk +qos)
<o:p></o:p></p>
<p class="MsoNormal">Due to the current problems with RDMA we though eventually we could try a workaround :<o:p></o:p></p>
<p class="MsoNormal">If you are interested there is Maybe you can find the attachment ?
<o:p></o:p></p>
<p class="MsoNormal">We build 2 separate fabrics , the ess-IO servers attached to both blue and green and all other cluster members and all remote clusters only to fabric blue
<o:p></o:p></p>
<p class="MsoNormal">The daemon interfaces (IPoIP) are on fabric blue<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">It is the aim to setup rdma only on the ess-ioServers in the fabric green , in the blue we must use IPoIB (tcp)
<o:p></o:p></p>
<p class="MsoNormal">Do you think datamigration would work between ess01,ess02,… to ess07,ess08 via RDMA ?<o:p></o:p></p>
<p class="MsoNormal">Or is it principally not possible to make a rdma network only for a subset of a cluster (though this subset would be reachable via other fabric) ?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thank you very much for any input !<o:p></o:p></p>
<p class="MsoNormal">Best regards walter <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Mit freundlichen Grüßen<br>
<b><i>Walter Sklenka</i></b><br>
<b><i>Technical Consultant</i></b> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">EDV-Design Informationstechnologie GmbH<br>
Giefinggasse 6/1/2, A-1210 Wien<br>
Tel: <a href="tel:+43%201%2029%2022%20165-31">+43 1 29 22 165-31</a><br>
Fax: <a href="tel:+43%201%2029%2022%20165-90">+43 1 29 22 165-90</a><br>
E-Mail: <a href="mailto:sklenka@edv-design.at">sklenka@edv-design.at</a><br>
Internet: <a href="http://www.edv-design.at/">www.edv-design.at</a><o:p></o:p></p>
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