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Ah, yes, that will likely be a tricky one. You may simply have to bite the bullet, copy what you can early, and accept a downtime to finalize.<br>
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Note also that there may be no kernel version for which you could compile both of those? Possibly some version of CentOS 6.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> David Cohen <cdavid@physics.technion.ac.il><br>
<b>Sent:</b> Sunday, December 31, 2017 2:50:05 AM<br>
<b>To:</b> Patrick Farrell<br>
<b>Cc:</b> lustre-discuss@lists.lustre.org<br>
<b>Subject:</b> Re: [lustre-discuss] Lustre Client in a container</font>
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<div>Patrick,<br>
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Thanks for you response.<br>
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I looking for a way to migrate from 1.8.9 system to 2.10.2, stable enough to run the several weeks or more that it might take.<br>
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David<br>
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<div class="x_gmail_quote">On Sun, Dec 31, 2017 at 12:12 AM, Patrick Farrell <span dir="ltr">
<<a href="mailto:paf@cray.com" target="_blank">paf@cray.com</a>></span> wrote:<br>
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<p style="margin-top:0; margin-bottom:0">David,</p>
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<p style="margin-top:0; margin-bottom:0">I have no direct experience trying this, but I would imagine not - Lustre is a kernel module (actually a set of kernel modules), so unless the container tech you're using allows loading multiple different versions of
*kernel modules*, this is likely impossible. My limited understanding of container tech on Linux suggests that this would be impossible, containers allow userspace separation but there is only one kernel/set of modules/drivers.</p>
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<p style="margin-top:0; margin-bottom:0">I don't know of any way to run multiple client versions on the same node.</p>
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<p style="margin-top:0; margin-bottom:0">The other question is *why* do you want to run multiple client versions on one node...? Clients are usually interoperable across a pretty generous set of server versions.</p>
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<p style="margin-top:0; margin-bottom:0">- Patrick</p>
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<div id="x_m_3136176981393631895divRplyFwdMsg" dir="ltr"><font color="#000000" face="Calibri, sans-serif" style="font-size:11pt"><b>From:</b> lustre-discuss <<a href="mailto:lustre-discuss-bounces@lists.lustre.org" target="_blank">lustre-discuss-bounces@lists.<wbr>lustre.org</a>>
on behalf of David Cohen <<a href="mailto:cdavid@physics.technion.ac.il" target="_blank">cdavid@physics.technion.ac.il</a><wbr>><br>
<b>Sent:</b> Saturday, December 30, 2017 11:45:15 AM<br>
<b>To:</b> <a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.<wbr>org</a><br>
<b>Subject:</b> [lustre-discuss] Lustre Client in a container</font>
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<div>Hi,<br>
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Is it possible to run Lustre client in a container?<br>
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The goal is to run two different client version on the same node, can it be done?<br>
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David<br>
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