de>
            </p>
                <p>
                 Configure Berkeley DB to flush log writes to the backing disk before
                 returning from the write system call, rather than flushing log writes
                 explicitly in a separate system call, as necessary.  This is only
                 available on some systems (for example, systems supporting the
                 IEEE/ANSI Std 1003.1 (POSIX) standard O_DSYNC flag, or systems
                 supporting the Windows FILE_FLAG_WRITE