Dear prof Giannozzi<br><br>sorry to disturb you but i want to ask one question. the same work raran QE simulation with 40 atoms with 8 nodes and 12 nodes. the system
got relaxed in 2 days 11 hrs with 8 nodes but it could nod relax even
in 3 days with 12 nodes. even it got relaxed with 16 nodes in 2 days 11 hrs but not relax in 6 days with 32 nodes.<br><br>can u help me out.<br><br>with regards <br><br><div><br></div><div class="im"><div>vicky singh</div>
<font color="#888888"><div>research student</div><div>Bangalore</div>
</font></div><br><br><br><div class="gmail_quote">On Tue, Jul 20, 2010 at 1:17 PM, Paolo Giannozzi <span dir="ltr"><<a href="mailto:giannozz@democritos.it">giannozz@democritos.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">vicky singh wrote:<br>
<br>
> Can anybody let me know how does the quantum espresso scale with<br>
> increasing the number of nodes or number of processors.<br>
<br>
</div>short answer: it depends. Please read the documentation, in<br>
particular sec.3 of the userguide; sec.5 of J.Phys. Condens.<br>
Matter 21, 395502 (2009); the following slides:<br>
<a href="http://www.fisica.uniud.it/%7Egiannozz/QE-Tutorial/tutorial_para.pdf" target="_blank">http://www.fisica.uniud.it/~giannozz/QE-Tutorial/tutorial_para.pdf</a><br>
<br>
P.<br>
<font color="#888888">--<br>
Paolo Giannozzi, Democritos and University of Udine, Italy<br>
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