<p>
                        Environments. The directory that is created
                        alongside your database file, and which ends with
                        the "-journal" suffix, is actually a Berkeley DB
                        environment directory.
                    </p>
          </li>
          <li>
            <p>
                        The Locking Subsystem
                    </p>
            <p>
                        The Berkeley DB library implements locking in a different
     