<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
Hi Han Lung,<br>
<br>
Parallel NetCDF is in use by a number of users of the WRF system.
I've used it regularly to improve I/O performance on the NCAR IBM
systems, using GPFS, and on Lustre file systems at NREL and
elsewhere. You don't need to install NetCDF to use pNetCDF but
people generally do. To run WRF using pNetCDF, set the io_form_*
variable in WRF's namelist.input file to 11 (instead of 2, which
means regular NetCDF). You can set these separately for input,
history, boundary data, restart, and any of the auxiliary input and
auxiliary history streams in WRF. <br>
<br>
Please let me know if you need more information. You can also
contact <a class="moz-txt-link-abbreviated" href="mailto:wrfhelp@ucar.edu">wrfhelp@ucar.edu</a> for assistance.<br>
<br>
Regards,<br>
<br>
John<br>
<br>
On 8/31/2011 3:54 PM, Han Lung wrote:
<blockquote
cite="mid:424AA9ACB7C7314B961D9042672BA4960DFBFFB3F4@SV-EXCHANGE1.Corp.FC.LOCAL"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta name="Generator" content="Microsoft Word 12 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:PMingLiU;
panose-1:2 2 3 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:PMingLiU;
panose-1:2 2 3 0 0 0 0 0 0 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal">To whom it may concern,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is Han Lung, Director of HPC Group,
Fujitsu America. I am new to WRF and parallel-netcdf, so if I
have asked some stupid questions please bear with me.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">From the README file for WRF, I realize WRF
requires NetCDF. In the last section of the README file
(Software section), I see “* I/O: NetCDF, parallel NetCDF
(Argonne), HDF5,…”, but I do not see how to use parallel
NetCDF with WRF. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My questions are:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">1. Do you know anyone who used WRF +
Parallel NetCDF?<o:p></o:p></p>
<p class="MsoNormal">2. Do I have to install NetCDF for WRF even
if I want to use Parallel NetCDF?<o:p></o:p></p>
<p class="MsoNormal">3. How do I run WRF with Parallel NetCDF?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Your help is deeply appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks and best regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Han Lung<o:p></o:p></p>
<p class="MsoNormal">Director, HPC Group<o:p></o:p></p>
<p class="MsoNormal">Fujitsu America, Inc.<o:p></o:p></p>
<p class="MsoNormal"><a moz-do-not-send="true"
href="mailto:hlung@us.fujitsu.com">hlung@us.fujitsu.com</a><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
John Michalakes
National Renewable Energy Laboratory
1617 Cole Blvd.
Golden, Colorado 80401
Phone: 303-275-4297
Fax: 303-275-4091
<a class="moz-txt-link-freetext" href="http://www.nrel.gov/csc/staff_michalakes.html">http://www.nrel.gov/csc/staff_michalakes.html</a>
</pre>
</body>
</html>