<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>It's 4 racks of 10, and one rack of 6. For a total of 5 racks,
not counting the storage system. </p>
<p>I believe this is because of power/cooling limitations of the
air-cooled systems. We have water-cooled rear-door heat
exchangers, but they're only good up to about 35 KW/rack. Since we
have 4 GPUs per server these things are consuming more power and
putting out more heat than your average 1U pizza-box or blade
server. Bill can answer more authoritatively, since he was
involved in those discussions. <br>
</p>
<p>--<br>
Prentice <br>
</p>
<div class="moz-cite-prefix">On 10/10/19 12:57 PM, Scott Atchley
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAL8g0jL1nd0QRH4_xWqMG6OAxozTSkBaiqUrSqdOLOugedS2xA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">That is better than 80% peak, nice.
<div><br>
</div>
<div>Is it three racks of 15 nodes? Or two racks of 18 and 9 in
the third rack?</div>
<div><br>
</div>
<div>You went with a single-port HCA per socket and not the
shared, dual-port HCA in the shared PCIe slot?</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Oct 10, 2019 at 8:48
AM Bill Wichser <<a href="mailto:bill@princeton.edu"
moz-do-not-send="true">bill@princeton.edu</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">Thanks
for the kind words. Yes, we installed more like a mini-Sierra
<br>
machine which is air cooled. There are 46 nodes of the IBM
AC922, two <br>
socket, 4 V100 where each socket uses the SMT threading x4.
So two 16 <br>
core chips, 32/node, 128 threads per node. The GPUs all use
NVLink.<br>
<br>
There are two EDR connections per host, each tied to a CPU,
1:1 per rack <br>
of 12 and 2:1 between racks. We have a 2P scratch filesystem
running <br>
GPFS. Each node also has a 3T NVMe card as well for local
scratch.<br>
<br>
And we're running Slurm as our scheduler.<br>
<br>
We'll see if it makes the top500 in November. It fits there
today but <br>
who knows what else got on there since June. With the help of
nVidia we <br>
managed to get 1.09PF across 45 nodes.<br>
<br>
Bill<br>
<br>
On 10/10/19 7:45 AM, Michael Di Domenico wrote:<br>
> for those that may not have seen<br>
> <br>
> <a
href="https://insidehpc.com/2019/10/traverse-supercomputer-to-accelerate-fusion-research-at-princeton/"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://insidehpc.com/2019/10/traverse-supercomputer-to-accelerate-fusion-research-at-princeton/</a><br>
> <br>
> Bill Wischer and Prentice Bisbal are frequent
contributors to the<br>
> list, Congrats on the acquisition. Its nice to see more
HPC expansion<br>
> in our otherwise barren hometown... :)<br>
> <br>
> Maybe one of them will pass along some detail on the
machine...<br>
> _______________________________________________<br>
> Beowulf mailing list, <a
href="mailto:Beowulf@beowulf.org" target="_blank"
moz-do-not-send="true">Beowulf@beowulf.org</a> sponsored by
Penguin Computing<br>
> To change your subscription (digest mode or unsubscribe)
visit <a
href="https://beowulf.org/cgi-bin/mailman/listinfo/beowulf"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://beowulf.org/cgi-bin/mailman/listinfo/beowulf</a><br>
> <br>
_______________________________________________<br>
Beowulf mailing list, <a href="mailto:Beowulf@beowulf.org"
target="_blank" moz-do-not-send="true">Beowulf@beowulf.org</a>
sponsored by Penguin Computing<br>
To change your subscription (digest mode or unsubscribe) visit
<a href="https://beowulf.org/cgi-bin/mailman/listinfo/beowulf"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://beowulf.org/cgi-bin/mailman/listinfo/beowulf</a><br>
</blockquote>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
Beowulf mailing list, <a class="moz-txt-link-abbreviated" href="mailto:Beowulf@beowulf.org">Beowulf@beowulf.org</a> sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit <a class="moz-txt-link-freetext" href="https://beowulf.org/cgi-bin/mailman/listinfo/beowulf">https://beowulf.org/cgi-bin/mailman/listinfo/beowulf</a>
</pre>
</blockquote>
</body>
</html>