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<div id="preamble"><h1>Module Apache mod_lbmethod_bytraffic</h1>
<div class="toplang">
<p><span>Langues Disponibles: </span><a href="../en/mod/mod_lbmethod_bytraffic.html" hreflang="en" rel="alternate" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/mod/mod_lbmethod_bytraffic.html" title="Franais">&nbsp;fr&nbsp;</a></p>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Algorithme de planification avec rpartition de charge en
fonction d'un niveau de trafic pour le module
<code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code></td></tr>
<tr><th><a href="module-dict.html#Status">Statut:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">IdentificateurdeModule:</a></th><td>lbmethod_bytraffic_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">FichierSource:</a></th><td>mod_lbmethod_bytraffic.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibilit:</a></th><td>Dissoci de <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code> depuis la
version 2.3</td></tr></table>
<h3>Sommaire</h3>

<p>Ce module ne fournit pas lui-mme de directive de configuration. Il
ncessite les services de <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code>, et
fournit la mthode de rpartition de charge <code>bytraffic</code>.</p>
</div>
<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3>Sujets</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#traffic">Algorithme de rpartition en fonction d'un certain
    trafic</a></li>
</ul><h3 class="directives">Directives</h3>
<p>Ce module ne fournit aucune directive.</p>
<h3>Traitement des bugs</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">Journal des modifications de httpd</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_lbmethod_bytraffic">Problmes connus</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_lbmethod_bytraffic">Signaler un bug</a></li></ul><h3>Voir aussi</h3>
<ul class="seealso">
<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
<li><code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code></li>
<li><a href="#comments_section">Commentaires</a></li></ul></div>
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<div class="section">
<h2><a name="traffic" id="traffic">Algorithme de rpartition en fonction d'un certain
    trafic</a></h2>
    
    <p>Activ via <code>lbmethod=bytraffic</code>, l'ide directrice de
    ce planificateur est similaire  celle de la mthode reposant sur le
    nombre de requtes, avec les diffrences suivantes :</p>

    <p><dfn>lbfactor</dfn> reprsente la <em>quantit de trafic, en
    octets, que nous voulons voir traite par le processus</em>. Il
    s'agit l aussi d'une valeur normalise reprsentant la part de
    travail  effectuer par le processus, mais au lieu de se baser sur
    un nombre de requtes, on prend en compte la quantit de trafic que
    ce processus a trait.</p>

    <p>Si un rpartiteur est configur comme suit :</p>

    <table><tr><th>worker</th>
        <th class="data">a</th>
        <th class="data">b</th>
        <th class="data">c</th></tr>
<tr><th>lbfactor</th>
        <td class="data">1</td>
        <td class="data">2</td>
        <td class="data">1</td></tr>
</table>

    <p>Cela signifie que nous souhaitons que <var>b</var> traite 2 fois
    plus d'octets que <var>a</var> ou <var>c</var>. Cela n'entrane pas
    ncessairement que <var>b</var> va traiter deux fois plus de
    requtes, mais qu'il va traiter deux fois plus de trafic en termes
    d'entres/sorties. A cet effet, les tailles de la requte et de sa
    rponse assoccie sont prises en compte par l'algorithme de
    slection et d'valuation du trafic.</p>

    <p>Note : les octets en entre sont valus avec la mme pondration
    que les octets en sortie.</p>

</div>
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