<code class="literal">S_IWGRP</code>; or octal mode 0660 on historic
                    UNIX systems). The group ownership of created files is based
                    on the system and directory defaults, and is not further
                    specified by DB.
                </p>
              </li>
              <li>
                <p>
                    Temporary backing files
                </p>
                <p>
                    If an unnamed database is created and the cache is too small
  