<div dir="ltr"><div>Theoretically, a faster HDD would help with writing output. But if the history intervals you'll use are not extremely tight (i.e. in order of minutes or seconds), I don't think that effects the performance of WRF very much. However, not much for running the model, but during postprocessing, a faster reading can become quite important. </div>
<div><br></div><div>RAM size would be crucial depending on your domain size (in terms of dx, dy and number of vertical levels). I guess a wiser choice would be increasing ram, if you are dealing with very large domains, rather than HDD. The RAM transfer rate (and that of mainboard) should be high as well, since maybe almost all performance depends on the CPU, RAM and the transfers between them.</div>
<div><br></div><div>If there is no problem with the domain sizes or excessive postprocessing, I would improve the CPUs instead of any other hardware components. But maybe searching for benchmarks online would help better with your decision. </div>
<div><br></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr"><b>Abdullah KAHRAMAN</b><br>Visiting Research Scholar<br>Department of Meteorology<div></div><div>Pennsylvania State University</div><div>410 Walker Building</div>
<div>University Park, PA 16802 </div><div><div><div><b>Meteogreen: <a href="http://web.itu.edu.tr/kahramanab/index.php" target="_blank">http://web.itu.edu.tr/kahramanab/index.php</a></b><br></div></div></div></div></div>
<br><br><div class="gmail_quote">On Mon, Jan 13, 2014 at 4:07 PM, Julio Castro <span dir="ltr"><<a href="mailto:julio.castro@arcadis.cl" target="_blank">julio.castro@arcadis.cl</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span lang="EN-US">Hi all,</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">We are getting a dedicated machine to run WRF. 32 GB RAM and 2
</span><strong><span lang="EN-US" style="font-size:7.5pt;font-family:"Arial","sans-serif"">Intel Xeon E5-2450 2.10GHz, 20M Cache (8 cores each)
</span></strong><span lang="EN-US"> with some <b>7.2K RPM SATA 3Gbps HDs, my question is if there is any point in getting faster HD, say 10 K or 15K RPM instead of the 7.2K RPM?</b></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks in advance</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#0079a2">Julio Castro M.</span></b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#555555"> </span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#333333">|
Especialista Senior en Calidad de Aire | </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#333333"><a href="mailto:julio.castro@arcadis.cl" target="_blank"><span style="font-family:"Times New Roman","serif";color:blue">julio.castro@arcadis.cl</span></a></span><span></span></p>
<p class="MsoNormal" style="margin-top:6.0pt;line-height:120%"><span style="font-size:9.0pt;line-height:120%;font-family:"Arial","sans-serif";color:#0079a2">ARCADIS Chile</span><span style="font-size:9.0pt;line-height:120%;font-family:"Arial","sans-serif";color:#333333">
| Antonio Varas #621| Providencia</span><span></span></p>
<p class="MsoNormal" style="line-height:120%"><span style="font-size:9.0pt;line-height:120%;font-family:"Arial","sans-serif";color:#333333">CP 7500655 | Santiago | Chile</span><span></span></p>
<p class="MsoNormal" style="line-height:120%"><span lang="EN-US" style="font-size:9.0pt;line-height:120%;font-family:"Arial","sans-serif";color:#333333">T. <a href="tel:%2B%2056%202%202%203816248" value="+56223816248" target="_blank">+ 56 2 2 3816248</a> | F. <a href="tel:%2B%2056%202%202%203816001" value="+56223816001" target="_blank">+ 56 2 2 3816001</a></span><span lang="EN-US"></span></p>
<p class="MsoNormal" style="line-height:120%"><span lang="EN-US" style="font-size:9.0pt;line-height:120%;font-family:"Arial","sans-serif";color:#333333"><a href="http://www.arcadis.cl/" target="_blank"><span style="font-family:"Times New Roman","serif";color:blue">www.arcadis.cl</span></a></span><span lang="EN-US"></span></p>
<p class="MsoNormal" style="line-height:120%"><span lang="EN-US" style="font-size:9.0pt;line-height:120%;font-family:"Arial","sans-serif";color:#333333"> </span><span lang="EN-US"></span></p>
<p class="MsoNormal" style="line-height:120%"><span lang="EN-US" style="font-size:9.0pt;line-height:120%;font-family:"Arial","sans-serif";color:#333333">ARCADIS, Imagine the result</span><span lang="EN-US"></span></p>
<p class="MsoNormal" style="margin-top:14.0pt;line-height:110%"><b><span style="font-size:7.0pt;line-height:110%;font-family:"Arial","sans-serif";color:#009a00">Antes de imprimir este correo piense bien si es necesario. ARCADIS por un mundo sustentable.</span></b><span></span></p>
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