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Hi Andreas,<br>
<br>
<br>
doesn't it suffice to use priority tier partitions? You don't need
to use preemption at all, do you?<br>
<br>
<br>
Best<br>
Marcus<br>
<br>
<div class="moz-cite-prefix">On 2/18/19 8:27 AM, Henkel, Andreas
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:B56FC9CE-B0A6-403D-A7FC-7532BA0C627A@uni-mainz.de">
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<div dir="ltr">Hi David,</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">I think there is another option if you don’t want
to use preemption. If the max runlimit is small (several hours
for example) working without preemption may be acceptable. </div>
<div dir="ltr">Assign a qos with a priority boost to the owners of
the node. Then whenever they submit jobs to the partition they
get to the top off the queue.</div>
<div dir="ltr">This works only if there is one dedicated partition
for those nodes but accessible for all users of course. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Best,</div>
<div dir="ltr">Andreas </div>
<div dir="ltr"><br>
Am 15.02.2019 um 18:08 schrieb david baker <<a
href="mailto:djbaker12@gmail.com" moz-do-not-send="true">djbaker12@gmail.com</a>>:<br>
<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">Hi Paul, Marcus,
<div><br>
</div>
<div>Thank you for your replies. Using partition priority
all makes sense. I was thinking of doing something similar
with a set of nodes purchased by another group. That is,
having a private high priority partition and a lower
priority "scavenger" partition for the public. In this
case scavenger jobs will get killed when preempted. </div>
<div><br>
</div>
<div>In the present case , I did wonder if it would be
possible to do something with just a single partition --
hence my question.Your replies have convinced me that two
partitions will work -- with preemption leading to
re-queued jobs. </div>
<div><br>
</div>
<div>Best regards,</div>
<div>David </div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Feb 15, 2019 at
3:09 PM Paul Edmon <<a
href="mailto:pedmon@cfa.harvard.edu"
moz-do-not-send="true">pedmon@cfa.harvard.edu</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Yup, PriorityTier is what we use to do exactly that
here. That said unless you turn on preemption jobs
may still pend if there is no space. We run with
REQUEUE on which has worked well.</p>
<p><br>
</p>
<p>-Paul Edmon-</p>
<p><br>
</p>
<div class="gmail-m_8153567423438616633moz-cite-prefix">On
2/15/19 7:19 AM, Marcus Wagner wrote:<br>
</div>
<blockquote type="cite">Hi David,<br>
<br>
as far as I know, you can use the PriorityTier
(partition parameter) to achieve this. According to
the manpages (if I remember right) jobs from higher
priority tier partitions have precedence over jobs
from lower priority tier partitions, without taking
the normal fairshare priority into consideration.<br>
<br>
Best<br>
Marcus<br>
<br>
<div
class="gmail-m_8153567423438616633moz-cite-prefix">On
2/15/19 10:07 AM, David Baker wrote:<br>
</div>
<blockquote type="cite">
<div
id="gmail-m_8153567423438616633divtagdefaultwrapper"
dir="ltr">
<p style="margin-top:0px;margin-bottom:0px">Hello.</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">We
have a small set of compute nodes owned by a
group. The group has agreed that the rest of the
HPC community can use these nodes providing that
they (the owners) can always have priority
access to the nodes. The four nodes are well
provisioned (1 TByte memory each plus 2 GRID K2
graphics cards) and so there is no need to worry
about preemption. In fact I'm happy for the
nodes to be used as well as possible by all
users. It's just that jobs from the owners must
take priority if resources are scarce. </p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">What
is the best way to achieve the above in slurm?
I'm planning to place the nodes in their own
partition. The node owners will have priority
access to the nodes in that partition, but will
have no advantage when submitting jobs to the
public resources. Does anyone please have any
ideas how to deal with this?</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">Best
regards,</p>
<p style="margin-top:0px;margin-bottom:0px">David</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
</div>
</blockquote>
<br>
<pre class="gmail-m_8153567423438616633moz-signature" cols="72">--
Marcus Wagner, Dipl.-Inf.
IT Center
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80-24383
Fax: +49 241 80-624383
<a class="gmail-m_8153567423438616633moz-txt-link-abbreviated" href="mailto:wagner@itc.rwth-aachen.de" target="_blank" moz-do-not-send="true">wagner@itc.rwth-aachen.de</a>
<a class="gmail-m_8153567423438616633moz-txt-link-abbreviated" href="http://www.itc.rwth-aachen.de" target="_blank" moz-do-not-send="true">www.itc.rwth-aachen.de</a>
</pre>
</blockquote>
</div>
</blockquote>
</div>
</div>
</blockquote>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Marcus Wagner, Dipl.-Inf.
IT Center
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80-24383
Fax: +49 241 80-624383
<a class="moz-txt-link-abbreviated" href="mailto:wagner@itc.rwth-aachen.de">wagner@itc.rwth-aachen.de</a>
<a class="moz-txt-link-abbreviated" href="http://www.itc.rwth-aachen.de">www.itc.rwth-aachen.de</a>
</pre>
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