title: Can Graphite (whisper) metrics be renamed?
body: <p>I'm preparing to refactor some Graphite metric names, and would like to be able to preserve the historical data.    Can the .wsp files be renamed (and possibly moved to new directories if the higher level components change)?</p>
  
  <p>Example: group.subgroup1.metric is stored as:</p>
  
  <pre><code>/opt/graphite/storage/whisper/group/subgroup1/metric.wsp
  </code></pre>
  
  <p>Can I simply stop loading data and move metric.wsp to metricnew.wsp?</p>
  
  <p>Can I move metric.wsp to whisper/group/subgroup2/metric.asp?</p>