<div dir="ltr">What do your apps need?<div><br></div><div>• Lots of memory?</div><div><br></div><div>Perhaps Power9 or Naples with 8 memory channels? Also, Cavium ThunderX2.</div><div><br></div><div>• More memory bandwidth?</div><div><br></div><div>Same as above.</div><div><br></div><div>• Max single thread performance?</div><div><br></div><div>Intel or Power9?</div><div><br></div><div>• Are your apps GPU enabled? If not, do you have budget/time/expertise to do the work?</div><div><br></div><div>If not, then stick with CPUs.</div><div><br></div><div>• Need lots of PCIe for accelerators, SSDs, NICs?</div><div><br></div><div>Naples.</div><div><br></div><div>• Interconnect?</div><div><br></div><div>If Intel, either of the above. Does OPA work with Naples (I don't know)? If Power/ARM and possibly Naples, then IB.</div><div><br></div><div>Sorry to give the default computer science answer of "It depends."</div><div><br></div><div>Scott</div></div><br><div class="gmail_quote"><div dir="ltr">On Thu, Oct 11, 2018 at 3:09 PM Douglas Eadline <<a href="mailto:deadline@eadline.org">deadline@eadline.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">All:<br>
<br>
Over the last several months I have been reading about:<br>
<br>
1) Spectre/meltdown<br>
2) Intel Fab issues<br>
3) Supermicro MB issues<br>
<br>
I started thinking, if I were going to specify a<br>
single rack cluster, what would I use?<br>
<br>
I'm assuming a general HPC workload (not deep learning or<br>
analytics) I need to choose Xeon/Epyc, IB/Omni,<br>
Lustre/Ceph/BeGFS, should all nodes have GPU?<br>
<br>
I'm interested what members of this list think?<br>
<br>
<br>
-- <br>
Doug<br>
<br>
-- <br>
MailScanner: Clean<br>
<br>
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</blockquote></div>