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</a><h3>Internal vs. External Drivers</h3>
<p><a name="38370">
</a>Prior to Version 2.1, AOLserver provided a tightly-coupled solution to database driver integration, with database client libraries linked directly into the server. Such database drivers are called <i>internal drivers</i>.</p>
<p><a name="38392">
</a>Since Version 2.1, AOLserver provides an additional, loosely-coupled architecture, where AOLserver redirects all database requests to a separate process known as the <i>database proxy daemon</i>. This is accomplished using a special <i>external driver</i>, which looks just like an internal database driver to AOLserver.</p>
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