r application, and you also want to use the
         <a class="xref" href="db_recover.html" title="db_recover">db_recover</a> or
         <a class="xref" href="db_archive.html" title="db_archive">db_archive</a>
         utilities, then you should create a <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file and set
         the "add_data_dir" parameter in it.
    </p>
      <p>
         The <code class="methodname">DB_ENV-&gt;add_data_dir()</code> 