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<p>Because we want to maximize usage we actually have opted to just
cancel all running jobs the day of. We send out notification to
all the users that this will happen. We haven't really seen any
complaints and we've been doing this for years. At the start of
the outage we set all partitions to down, then run a cancel over
all the running jobs. Pending jobs are left in place, and users
are allowed to submit work during the outage and when we reopen
everything gets going again.</p>
<p>So there is a third option, though you have to accept that jobs
will be cancelled to pull it off.</p>
<p>-Paul Edmon-<br>
</p>
<div class="moz-cite-prefix">On 8/6/2020 1:13 PM, Jason Simms wrote:<br>
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<div dir="ltr">Hello all,
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<div>Later this month, I will have to bring down, patch, and
reboot all nodes in our cluster for maintenance. The two
options available to set nodes into a maintenance mode seem to
be either: 1) creating a system-wide reservation, or 2)
setting all nodes into a DRAIN state.</div>
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<div>I'm not sure it really matters either way, but is there any
preference one way or the other? Any gotchas I should be aware
of?</div>
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<div>Warmest regards,</div>
<div>Jason<br clear="all">
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-- <br>
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<div
style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px;margin:0px"><span
style="color:rgb(130,36,51)"><font
face="Century Gothic"><b>Jason L. Simms,
Ph.D., M.P.H.</b></font></span></div>
<div
style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px;margin:0px"><font
face="Century Gothic"><span>Manager of
Research and High-Performance Computing</span></font></div>
<div
style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px;margin:0px"><font
face="Century Gothic"><span>XSEDE Campus
Champion<br>
</span><span style="color:gray">Lafayette
College<br>
Information Technology Services<br>
710 Sullivan Rd | Easton, PA 18042<br>
Office: 112 Skillman Library<br>
p: (610) 330-5632</span></font></div>
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