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Kurt,</div>
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The phrasing is a little confusing. The idea is that you can do a rolling upgrade, but it is important to complete the upgrade and not continue running with servers at different versions. Version gaps between servers is OK in the context of a rolling upgrade
but not otherwise. That case you are describing - deliberately leaving different versions on different servers - is specifically what you're
<b>not</b> supposed to do, because server version interop isn't tested outside the context of a rolling upgrade.</div>
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Regards,
<div>Patrick</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> lustre-discuss <lustre-discuss-bounces@lists.lustre.org> on behalf of Kurt Strosahl via lustre-discuss <lustre-discuss@lists.lustre.org><br>
<b>Sent:</b> Monday, February 21, 2022 2:31 PM<br>
<b>To:</b> lustre-discuss@lists.lustre.org <lustre-discuss@lists.lustre.org><br>
<b>Subject:</b> [lustre-discuss] Upgrading lustre servers</font>
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Good afternoon,</div>
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I have a question about upgrading lustre servers... </div>
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The lustre manual says the following:</div>
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"Lustre software release 2.x.y release (minor) upgrade:<br>
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All servers must be upgraded at the same time, while some or all clients may be upgraded.<br>
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Rolling upgrades are supported for minor releases allowing individual servers and clients to be upgraded without stopping the Lustre file system."</div>
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which seems contradictory. Could I update one oss in a lustre file system from (say) 2.12.1 to 2.12.8, and leave the rest of the file system alone?</div>
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w/r,</div>
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<p style="margin-top:0px; margin-bottom:0px; margin-top:0; margin-bottom:0"><span id="x_ms-rterangepaste-start"></span><span style="color:rgb(51,51,51); font-family:monospace; font-size:14.16px">Kurt J. Strosahl (he/him)</span><br style="color:rgb(51,51,51); font-family:monospace; font-size:14.16px">
<span style="color:rgb(51,51,51); font-family:monospace; font-size:14.16px">System Administrator: Lustre, HPC</span><br style="color:rgb(51,51,51); font-family:monospace; font-size:14.16px">
<span style="color:rgb(51,51,51); font-family:monospace; font-size:14.16px">Scientific Computing Group, Thomas Jefferson National Accelerator Facility</span><span id="x_ms-rterangepaste-end"></span><br>
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