th-node-legend">
    <li class="dfshealth-node-icon dfshealth-node-alive">In service</li>
    <li class="dfshealth-node-icon dfshealth-node-down">Down</li>
    <li class="dfshealth-node-icon dfshealth-node-decommissioned">Decommissioned</li>
    <li class="dfshealth-node-icon dfshealth-node-down-decommissioned">Decommissioned &amp; dead</li>
  </ul>
</div>
<div class="page-header"><h1><small>Datanode usage histogram</small></h1></div>
<small><div id="datanode-usage-histogram"></div></small>
<div class="page