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<li class="breadcrumb-item"><a href="index.html"><span class="section-number">7. </span>Host specification</a></li>
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<h1><span class="section-number">7.3. </span>Listing Hosts on the Command Line<a class="headerlink" href="#listing-hosts-on-the-command-line" title="Permalink to this heading"></a></h1>
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<p>Many PRRTE commands accept the <code class="docutils literal notranslate"><span class="pre">--host</span></code> CLI parameter.
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<code class="docutils literal notranslate"><span class="pre">--host</span></code> accepts a comma-delimited list of tokens of the form:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">host</span><span class="p">[:</span><span class="n">slots</span><span class="p">]</span>
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</pre></div>
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<p>The <code class="docutils literal notranslate"><span class="pre">host</span></code> token can be either:</p>
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<ul class="simple">
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<li><p>A name that resolves to an IP address, or</p></li>
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<li><p>An IP address</p></li>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>The names and/or IP addresses of hosts are <em>only</em> used for
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identifying the target host on which to launch. They are
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<em>not</em> used for determining which network interfaces are used
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by applications (e.g., MPI or other network-based
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applications).</p>
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<p>For network-based applications, consult their documentation
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for how to specify which network interfaces are used.</p>
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<p>The optional integer <code class="docutils literal notranslate"><span class="pre">:slots</span></code> parameter tells PRRTE the maximum
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number of slots to use on that host (see this section on definition
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of the term <code class="docutils literal notranslate"><span class="pre">slot</span></code> for a description of what a “slot” is).</p>
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<p>For example:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">prterun</span> <span class="o">--</span><span class="n">host</span> <span class="n">node1</span><span class="p">:</span><span class="mi">10</span><span class="p">,</span><span class="n">node2</span><span class="p">,</span><span class="n">node3</span><span class="p">:</span><span class="mi">5</span> <span class="o">...</span>
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