<div dir="ltr">Dear Roland,<div><br></div><div>Thank you very much for your detailed response. </div><div>I am chiefly interested in running binary black hole simulations.</div><div>It turns out that I can only purchase a workstation with my project money.</div><div>However, as you suggest I will try and get an account in a cluster eventually. </div><div>In case I face any difficulty at that time I will get back to you.</div><div><br></div><div>Thanks and best regards,</div><div>Indrani</div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>********************************************** </div><div>Indrani Banerjee </div><div>Assistant Professor </div><div>Department of Physics & Astronomy, </div><div>National Institute of Technology, Rourkela </div><div>Odisha-769008, India </div><div>email: <a href="mailto:banerjeein@nitrkl.ac.in" target="_blank">banerjeein@nitrkl.ac.in</a>, </div><div><a href="mailto:indrani.physics1@gmail.com" target="_blank">indrani.physics1@gmail.com</a> </div><div>**********************************************</div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Oct 6, 2022 at 8:06 PM Roland Haas <<a href="mailto:rhaas@illinois.edu">rhaas@illinois.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">Dear Indrani,<br>
<br>
Sorry for the long delay. We had discussed you question already in last<br>
week's Einstein Toolkit call.<br>
<br>
Unfortunately there is no direct answer that one can provide. <br>
<br>
The size of the workstation is very much dependent on the intended use,<br>
large differences existing for example between purely vacuum and<br>
simulations including matter. The latter usually being at least twice<br>
as expensive compute time and memory wise.<br>
<br>
Generically a single workstation is not really enough for production<br>
type work, since you usually need to either run many smaller<br>
simulations (so a single workstation is not enough) or one large<br>
simulation (in which case it won't fit on the workstation).<br>
<br>
Usually a workstation would be used for development and testing. For<br>
development you would require only a "typical" workstation and 16GB of<br>
RAM would be enough. For testing, one with large memory (>64GB) can be<br>
useful to test code (fits memory-wise0 but will be slow due to only a<br>
single CPU socket. I use my own workstation (96GB, 12 slow cores), for<br>
this. <br>
<br>
You can take a look at the gallery examples:<br>
<br>
BBH: <br>
<a href="http://einsteintoolkit.org/gallery/bbh/index.html" rel="noreferrer" target="_blank">http://einsteintoolkit.org/gallery/bbh/index.html</a><br>
98GB, somewhat reasonable resolution but "real" ones could well be<br>
about 2 times more expensive memory wise<br>
<br>
BNS:<br>
<a href="http://einsteintoolkit.org/gallery/bns/index.html" rel="noreferrer" target="_blank">http://einsteintoolkit.org/gallery/bns/index.html</a><br>
8.8GB for the BNS example but it is *way* too low resolution. Normally<br>
the resolution across the star should be about 150m (about 0.1Msun) but<br>
currently is 416m (0.28) so 2.8 times too coarse. This will make the<br>
"real" run use ~20 times more memory (so ~128GB or so).<br>
<br>
For actual data production accessing a small cluster is usually best.<br>
Either on campus or via a national or international institution. I do<br>
not know what the situation in your location is like. In the US / EU<br>
one would usually try ACCESS / PRACE startup allocations first.<br>
<br>
Yours,<br>
Roland<br>
<br>
> Hello everyone,<br>
> <br>
> I am planning to buy a workstation from my project. Can anyone suggest what<br>
> should be its minimal configuration so that I can install Einstein Toolkit<br>
> in it and use it to generate numerical waveforms?<br>
> <br>
> Thanks in advance.<br>
> With best regards,<br>
> Indrani<br>
> **********************************************<br>
> Indrani Banerjee<br>
> Assistant Professor<br>
> Department of Physics & Astronomy,<br>
> National Institute of Technology, Rourkela<br>
> Odisha-769008, India<br>
> email: <a href="mailto:banerjeein@nitrkl.ac.in" target="_blank">banerjeein@nitrkl.ac.in</a>,<br>
> <a href="mailto:indrani.physics1@gmail.com" target="_blank">indrani.physics1@gmail.com</a><br>
> **********************************************<br>
<br>
<br>
<br>
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</blockquote></div>