--- mitgcm.org/sealion/download_software/viaCVS.html	2001/10/21 14:20:34	1.4
+++ mitgcm.org/sealion/download_software/viaCVS.html	2001/10/22 03:37:43	1.9
@@ -10,28 +10,119 @@
 <center>
 <h2>
 Hardware/software requirements</h2></center>
+This page summarizes computer system requirements for using MITgcm in a
+<a href="../online_documents/manual/sarch.html#fig:mitgcm_architecture_goals">range
+of computers</a> from desktop PC to simulations run on a high-end supercomputer.
+<p>The side bar on the left contains links to sites from which third party
+software and hardware, which you may require, can be obtained.
+<p>The text below and the <a href="../online_documents/index.html" target="mainFrame">online
+document</a> explains when you will need these items. In many cases the
+software will already be installed on your computer and you can go straight
+ahead and <a href="../getting_started/index.html" target="mainFrame">start
+using</a> the model.
+<p><b>MITgcm</b>
+<ul>
+<li>
+runs on a wide <a href="../online_documents/manual/targethw.html">range
+of computer systems.</a></li>
 
+<li>
+includes special software (called <a href="../online_documents/manual/wrapper.html">WRAPPER</a>)
+to support efficient execution and relatively easy portability.</li>
+</ul>
+<b>Platforms where MITgcm is run regularly include:</b>
+<ul>
+<li>
+<a href="sideMenuBarFrame.html#hardware" target="sideMenuBarFrame">Unix
+PC's</a> (both Intel and AMD processor based) running Linux.</li>
 
-<p>MITgcm has been designed to run efficiently on a wide range of computer
-platforms. This is made possible by its WRAPPER interface which 
-largely insulates the 'under the hood stuff' from the user.
-<p>MITgcm also runs on a single PC and PC clusters.
-<p>The minimum you require to run the model is a PC running linux and a
-FORTRAN compiler.
-<p>.............
-<p>Once you have your computer set up, go here to download the model.
-<br>
+<li>
+<a href="sideMenuBarFrame.html#hardware" target="sideMenuBarFrame">Unix
+workstations</a> from Sun, SGI, HP, IBM, Compaq.</li>
+
+<li>
+Unix based PC and workstation <a href="sideMenuBarFrame.html#interconnects" target="sideMenuBarFrame">clusters</a>.</li>
+
+<li>
+high-end <a href="sideMenuBarFrame.html#hardware" target="sideMenuBarFrame">symmetric
+multi-processor systems</a>.</li>
+</ul>
+
+<ul>Under the WRAPPER, code can also run very efficiently on high-end vector
+processing systems.</ul>
+<b>The minimum you require to run the model is</b>
+<ul>
+<li>
+a computer running a <a href="sideMenuBarFrame.html#os" target="sideMenuBarFrame">Unix
+style operating system</a>.</li>
+
+<li>
+a Fortran 77, Fortran 90 or Fortran 95 <a href="sideMenuBarFrame.html#compilers" target="sideMenuBarFrame">compiler</a>.</li>
+
+<li>
+a <a href="sideMenuBarFrame.html#compilers" target="sideMenuBarFrame">C
+compiler</a>.</li>
+</ul>
+<b>To run parallel configurations you need</b>
+<ul>
+<li>
+a multi-process <a href="sideMenuBarFrame.html#hardware" target="sideMenuBarFrame">computer</a></li>
+
+<br>and either of
+<li>
+a <a href="sideMenuBarFrame.html#compilers" target="sideMenuBarFrame">compiler</a>
+and that supports multi-threaded programs.</li>
+
+<li>
+a system with an implementation of the <a href="sideMenuBarFrame.html#parallelism" target="sideMenuBarFrame">MPI
+library installed</a>.</li>
+
+<p><br>Instructions on running multi-process codes can be found 
+<a href="../online_documents/manual/multi-process.html#sec:multi-process-execution">here</a>.
+<br>Instructions regarding muti-threaded execution can be found 
+<a href="../online_documents/manual/multi-threaded.html#sec:multi-threaded-execution">here</a>.
+<p>Specialized communication software, to optimize performance on a specific
+platform, can also be introduced into the WRAPPER. This process is discussed
+<a href="../online_documents/manual/communication.html">here</a>.
+<p>Before running a parallel code we recommend you try one of the basic
+examples described on the 
+<a href=../getting_started/index.html target=mainFrame>getting started </a>
+page.</ul>
+<b>To perform derivative calculations you need</b>
+<ul>
+<li>
+an <a href="sideMenuBarFrame.html#differentiation" target="sideMenuBarFrame">automatic
+differentiation tool</a>.</li>
+
+<br>An example experiment illustrating the automatic differentiation process
+can be found <a href="../online_documents/manual/adexample.html">here</a>.</ul>
+
+<p><br><b>Once you have your computer set up</b>
+<blockquote>go <a href="../getting_started/index.html" target="mainFrame">here
+</a>to find out how to download the model. The full distribution (including
+examples with input datasets and sample output) is around 50MB. Instructions
+on estimating the computing resource requirements (CPU time, memory usage
+and disk space) for a set of numerical experiments can be found here.</blockquote>
+<b>Simulation output is usually examined</b>
+<blockquote>using one of several <a href="sideMenuBarFrame.html#analysis" target="sideMenuBarFrame">standard
+analysis tools</a>, depending on individual preference and experience.</blockquote>
+
+<p><br><b>Still confused?</b>
+<blockquote>send us <a href="mailto:support@mitgcm.org">mail</a>. We like
+our software to be used and are happy to help out if we can.
+<p>
 <hr WIDTH="100%">
 <table CELLSPACING=0 CELLPADDING=0 WIDTH="100%" NOSAVE >
 <tr NOSAVE>
-<td NOSAVE>Last modified on $Date: 2001/10/21 14:20:34 $</td>
+<td NOSAVE>Last modified on $Date: 2001/10/22 03:37:43 $</td>
 
 <td>
 <div align=right>CVS:  /u/gcmpack/mitgcm.org/sealion/download_software/viaCVS.html,v
-$Revision: 1.4 $</div>
+$Revision: 1.9 $</div>
 </td>
 </tr>
 </table>
+</blockquote>
 
 </body>
 </html>