 synchronous options are all turned off).  I.e.,
             every write is pushed to the operating system, but the
             benchmark does not wait for the write to reach the disk.</li>
	<li> Keys are 16 bytes each.</li>
        <li> Value are 100 bytes each (with enough redundancy so that
             a simple compressor shrinks them to 50% of their original
             size).</li>
	<li> Sequential reads/writes traverse the key space in increasing order.</li>
	<li> Random reads/writes traverse the k