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<div id="preamble"><h1>Module Apache mod_lbmethod_bybusyness</h1>
<div class="toplang">
<p><span>Langues Disponibles: </span><a href="../en/mod/mod_lbmethod_bybusyness.html" hreflang="en" rel="alternate" title="English"> en </a> |
<a href="../fr/mod/mod_lbmethod_bybusyness.html" title="Franais"> fr </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 de
l'attribution des requtes en attente 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_bybusyness_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">FichierSource:</a></th><td>mod_lbmethod_bybusyness.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>bybusyness</code>.</p>
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<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="#busyness">Algorithme d'attribution des requtes en attente</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__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_lbmethod_bybusyness">Problmes connus</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_lbmethod_bybusyness">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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<h2><a name="busyness" id="busyness">Algorithme d'attribution des requtes en attente</a></h2>
<p>Activ via <code>lbmethod=bybusyness</code>, ce planificateur
surveille le nombre de requtes assignes chaque processus worker
l'instant prsent. Une nouvelle requte est automatiquement
assigne au processus worker auquel est assign le plus petit nombre de
requtes. Ceci s'avre utile dans le cas o les
processus worker mettent en file d'attente les requtes entrantes
indpendamment d'Apache, et permet de s'assurer que la longueur des
files reste raisonnable, et qu'une requte est toujours assigne au
processus worker qui sera mme de la servir le plus
rapidement et avec une latence rduite.</p>
<p>Si plusieurs processus worker s'avrent les moins chargs, le
choix d'un de ces derniers est effectu partir des statistiques
(et des estimations de charges) qu'utilise la mthode de dcompte
des requtes. Au fil du temps, la distribution des tches finit par
ressembler celle de <code>byrequests</code> (tel qu'implment par
<code class="module"><a href="../mod/mod_lbmethod_byrequests.html">mod_lbmethod_byrequests</a></code>).</p>
</div>
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