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in-situ AND potential density are calculated and used in the ocean version

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4<meta http-equiv="CONTENT-TYPE" content="text/html; charset=windows-1252"><title>PALM chapter 4.5.7</title> <meta name="GENERATOR" content="StarOffice 7 (Win32)"> <meta name="AUTHOR" content="Siegfried Raasch"> <meta name="CREATED" content="20041029;14344622"> <meta name="CHANGED" content="20050119;9531085"> <meta name="KEYWORDS" content="parallel LES model"> <style>
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8</style></head><body style="direction: ltr;" lang="en-US"><h4 style="line-height: 100%;"><font size="4">4.5.7
9Plots of
10isosurfaces, 2d cross sections and particles with dvrp</font></h4>
11<p style="line-height: 100%;"><span style="font-weight: bold;">Preliminary note:</span></p><p style="line-height: 100%;">Usage of the <span style="font-weight: bold;">dvrp</span>-software requires installation of additional software components (dvrp-library, streaming-server, browser-plugin) which are <span style="font-weight: bold;">not</span>
12part of the PALM distribution. Currently (May 2009), this software is
13only available on the the HLRN/IMUK system and partly on RIAM's NEC
14system. If you are interested in using <span style="font-weight: bold;">dvrp</span> on your system, please contact the PALM developers.</p><br><span style="font-weight: bold;">General remarks:</span><p style="line-height: 100%;">The <span style="font-weight: bold;">dvrp</span>
15software was originally developed by the RRZN
16(Stephan Olbrich, Carsten Chmielewski) and is meanwhile continuosly developed and improved under the name <span style="font-weight: bold;">dsvr</span> by the University of Düsseldorf (Prof. Stephan Olbrich, see webpage of the <a href="http://www.dsvr-software.de/">dsvr-software</a>). It allows to create 3d-animations with PALM,
17which can be displayed via a special plugin for internet browsers. With
18suitable graphic hardware (e.g. NVIDIA quattro FX cards) even stereoscopic views are
19possible.</p><p style="line-height: 100%;">
20In contrast to the other kinds of visualization output realized
21in PALM (1d-, 2d-, 3d-NetCDF output),
22where the data
23is output in a format suitable for many kinds of post-processing graphic software, the creation of animations via <span style="font-weight: bold;">dvrp</span>
24software is
25integrated in PALM, i.e. respective routines are directly called within
26the PALM code. The
27<span style="font-weight: bold;">dvrp</span>
28routines then output the
29graphic data
30(so-called plot-primitives, e.g. polygones of isosurfaces) in a special
31dvr format. Since the <span style="font-weight: bold;">dvrp</span>
32software is parallelized (i.e. each PE calculates the graphic data for
33its subdomain), the visualization of simulations with very
34large numbers of grid points is possible (which so far failed because
35of
36several problems: volume of the raw data, which rapidly may sum-up to
37several Terabytes; main memory size needed for graphic workstations, on
38which the visualization is to be carried out; the insufficient scalar
39(!)
40computing speed of commercial graphic software in case of such
41large numbers of grid points). </p>
42<p style="line-height: 100%;">The coupling of <span style="font-weight: bold;">dvrp</span> software and
43PALM
44as well as the visualization of the model results via <span style="font-weight: bold;">dvrp</span> has been
45the main focus of the BMBF project "Application of
46tele-immersion in long-distance networks" (2001-2002),
47which was a joint project of RRZN, ZIB and IMUK. This work was
48continued by RRZN in the DFG-funded project "<a href="http://www.rrzn.uni-hannover.de/evita.html">EVITA</a> - Untersuchung
49effizienter
50Methoden zur visuellen und haptischen tele-immersiven
51Exploration
52komplexer Volumen- und Strömungsdaten aus
53parallelisierten,
54dynamischen 3D-Simulationen" (2005-2007). </p>
55<p style="line-height: 100%;"></p><p style="line-height: 100%;"><span style="font-weight: bold;">Using dvrp with PALM:</span></p><p style="line-height: 100%;">The calls of the <span style="font-weight: bold;">dvrp</span> routines are
56contained within a
57PALM software package (see chapter <a href="chapter_3.7.html">3.7</a>).
58To use this package, the additional option<tt style="font-family: monospace;"> </tt><font style="font-family: Courier New,Courier,monospace;" size="2">-p
59<span style="font-family: Helvetica,Arial,sans-serif;">“</span>dvrp_graphics<span style="font-family: Helvetica,Arial,sans-serif;">”</span></font><span style="font-family: monospace;">
60</span>has to be given in the <b>mrun</b> call. This
61automatically links the
62required libraries.
63Steering of the plot output is done via the package
64parameters (see chapter <a href="chapter_4.2.html">4.2</a>).
65In contrast to all other PALM output, <span style="font-weight: bold;">dvrp</span>
66graphic
67data are not output to local files but directly to a special remote
68computer which is defined via the package parameter <a href="chapter_4.2.html#dvrp_host">dvrp_host</a>. If the default values of the dvrp parameters are used, data are send to a so-called <span style="font-style: italic;">streaming server</span> at the
69RRZN. Apart from graphic data an additional html file is created, which
70can be opened by an internet browser to view the data (a special <span style="font-weight: bold;">dvrp</span> plugin is required for this).</p><p style="line-height: 100%;"></p><p style="line-height: 100%;"><span style="font-weight: bold;">Quickstart guide for using dvrp on the HLRN/IMUK-System (May 2009):</span></p><p style="line-height: 100%;">In the following, please replace the string<span style="font-family: Courier New,Courier,monospace; font-weight: bold;"> &lt;UNAME&gt; </span>with your IMUK username, wherever it appears. Please also replace the string<span style="font-family: Courier New,Courier,monospace;"><span style="font-weight: bold;"> &lt;UDIR&gt;</span> </span>with a subdirectory name of your choice. <span style="font-weight: bold;"></span> </p>
71<ol><li>
72Add the following define statements for environment variables to the configuration file (<span style="font-family: Courier New,Courier,monospace;">.mrun.config</span>):<br><br><span style="font-family: Courier New,Courier,monospace;"></span><span style="font-family: Courier New,Courier,monospace;"> &nbsp; &nbsp;%dvr_inc&nbsp;&nbsp;
73-I/home/h/niksiraa/dvr_mvapich2/lib&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
74&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcsgih parallel</span><br style="font-family: Courier New,Courier,monospace;"><span style="font-family: Courier New,Courier,monospace;">&nbsp; &nbsp;%dvr_lib&nbsp;&nbsp;&nbsp;-L/home/h/niksiraa/dvr_mvapich2/lib:-lDVRP2:-lftp&nbsp; &nbsp; lcsgih
75parallel</span><br><br><br></li><li>Add the dvrp-steering parameters to your NAMELIST-parameter file, e.g.<br><br><span style="font-family: Courier New,Courier,monospace;">&nbsp;&amp;d3par &nbsp;end_time = 3600.0,<br>&nbsp; ... &nbsp; &nbsp; /<br><br>&nbsp;&amp;dvrp_graphics_par &nbsp; dvrp_username = '<span style="font-weight: bold;">&lt;UNAME&gt;</span>',<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; dvrp_host = '130.75.105.2',<br>&nbsp;
76&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
77dvrp_directory = '<span style="font-weight: bold;">&lt;UNAME&gt;</span>/<span style="font-weight: bold;">&lt;UDIR&gt;</span>', ... /<br></span><br>For other dvrp-parameters see <a href="chapter_4.2.html#Paketparameter">chapter 4.2</a>. An example parameter file can be found in directory <span style="font-family: Courier New,Courier,monospace;">..../trunk/EXAMPLES/dvr &nbsp;</span>.<span style="font-family: Courier New,Courier,monospace;"><br><br></span></li><li>On the IMUK-system, create a subdirectory in which the dvrp-data are stored and give it access permit for group <span style="font-style: italic;">palm</span>.<br><br><span style="font-family: Courier New,Courier,monospace;">&nbsp; &nbsp;mkdir /data/raasch/Dvrp_daten/<span style="font-weight: bold;">&lt;UNAME&gt;<br>
78</span>&nbsp;&nbsp; chmod g+rwx</span><span style="font-family: Courier New,Courier,monospace;"> /data/raasch/Dvrp_daten/<span style="font-weight: bold;">&lt;UNAME&gt;</span></span><br><br>This directory has to be created only once, before dvrp is used for the first time.<br>
79<br></li><li>Submit the job&nbsp; with <span style="font-weight: bold;">mrun</span>-command<br><br><span style="font-family: Courier New,Courier,monospace;">&nbsp; &nbsp;mrun .... -p dvrp_graphics ....</span><br><br></li><li><span style="font-family: Courier New,Courier,monospace;"><span style="font-family: Times New Roman,Times,serif;">After the job has finished, the dvrp-output can be found on the IMUK-cluster in a subdirectory under <span style="font-family: Courier New,Courier,monospace;">/data/raasch/Dvrp_daten</span>. The name of the subdirectory is determined by the dvrp-parameter <a href="chapter_4.2.html#dvrp_directory">dvrp_directory</a> (see above), i.e. if the user has set <span style="font-family: Courier New,Courier,monospace;">dvrp_directory</span> = <span style="font-style: italic;">'<span style="font-weight: bold;">&lt;UNAME&gt;</span>/movie_1'</span>, the dvrp-data are stored under&nbsp;<span style="font-family: Courier New,Courier,monospace;">/data/raasch/Dvrp_daten/<span style="font-weight: bold;">&lt;UNAME&gt;</span>/movie_1</span>.<br><br></span></span></li><li><span style="font-family: Courier New,Courier,monospace;"><span style="font-family: Times New Roman,Times,serif;">Change to this subdirectory (e.g. </span></span><span style="font-family: Courier New,Courier,monospace;"><span style="font-family: Times New Roman,Times,serif;"><span style="font-family: Courier New,Courier,monospace;">/data/raasch/Dvrp_daten/&lt;UNAME&gt;/movie_1</span></span></span><span style="font-family: Courier New,Courier,monospace;"><span style="font-family: Times New Roman,Times,serif;">) and enter the command<br><br><span style="font-family: Courier New,Courier,monospace;">&nbsp; &nbsp;process_dvr_output</span><br><br>It will create a file with name <span style="font-family: Courier New,Courier,monospace;">all_streams_streaming.html</span>.<br><br></span></span></li><li><span style="font-family: Courier New,Courier,monospace;"><span style="font-family: Times New Roman,Times,serif;">Call the opera-browser (i.e. enter the command <span style="font-family: Courier New,Courier,monospace;">opera</span>) and open the file </span></span><span style="font-family: Courier New,Courier,monospace;"><span style="font-family: Times New Roman,Times,serif;"><span style="font-family: Courier New,Courier,monospace;">all_streams_streaming.html</span>.</span></span><span style="font-family: Courier New,Courier,monospace;"><span style="font-family: Times New Roman,Times,serif;"></span><br></span><br></li></ol><span style="font-weight: bold;">Further features:<br></span>The script<span style="font-family: Courier New,Courier,monospace;"> process_dvr_output </span>has additional options:<br><br><span style="font-weight: bold; font-family: Courier New,Courier,monospace;">-s</span> &nbsp; &nbsp; : <span style="font-weight: bold;">create sequence output</span>.
80All streams (and static scenes) are collected to one sequence (one
81static scene), which can be displayed with a browser without using the
82streaming server (the so-called sequence mode). This allows e.g. to
83show animations on a notebook without beeing connected to the internet.
84When the script is called with this option, the sequence is generated
85in subdirectory sequence_data. Copy this subdirectory and the file
86all_streams_sequence.html to a directory on your local computer and
87open the file all_streams_sequence.html with your browser. For this,
88you will need to install the the dvr-plugin (see webpage of the <a href="http://www.dsvr-software.de/">dsvr-software</a>) on your local computer, which is also available for Windows.<br><br><span style="font-weight: bold;">-a</span> &nbsp; &nbsp; &nbsp;: <span style="font-weight: bold;">acceleration factor</span>. If, in case of sequence mode, the performance of the animation is to slow, you can accelerate it. E.g., by using <span style="font-family: Courier New,Courier,monospace;">"-a 2</span>", only every second frame of the original streams will be used for the sequence.<br><br><br><br><br><span style="font-weight: bold;">Current limitations (May 09):</span><br>Only a special opera-version on host "bora" can be used. Log-in on "bora" and call &nbsp;<span style="font-family: Courier New,Courier,monospace;">/usr/bin/opera</span>. <span style="font-weight: bold;">Before that(!!!)</span>, enter the command "<span style="font-family: Courier New,Courier,monospace;">export LD_PRELOAD=libXm.so</span>" !
89<hr><p style="line-height: 100%;"><br>
90<font color="#000080"><font color="#000080"><a href="chapter_4.5.6.html"><font color="#000080"><img src="left.gif" name="Grafik1" align="bottom" border="2" height="32" width="32"></font></a><a href="index.html"><font color="#000080"><img src="up.gif" name="Grafik2" align="bottom" border="2" height="32" width="32"></font></a><a href="chapter_4.6.html"><font color="#000080"><img src="right.gif" name="Grafik3" align="bottom" border="2" height="32" width="32"></font></a></font></font></p><p style="line-height: 100%;">&nbsp;<i>Last
91change:&nbsp;</i> $Id: chapter_4.5.7.html 388 2009-09-23 09:40:33Z raasch $</p>
92</body></html>
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