title: graphite storage schema retention
body: <p>I have a question: I would like to keep whisper data for 1 year (7 days 5 seconds, 30 days 1 minute, 1y 5 minutes)</p>
  <p>Is this correct:</p>
  <pre><code>[default]
  pattern = .*
  retentions = 5s:7d,1m:30d,5m:1y
  </code></pre>
  <p>How long will my data be kept? 1 year ? or (7d+30d+1y) ?</p>
  <p>Secondly I would like to keep data for 2 years ( 7 days 5 seconds, 30 days 1 minute, 1y 5 minutes, 2y 1h</p>
  <pre><code>[default]
  pattern = .*
  retentions = 5s:7d,1m:30d,5m:1y,1h:2y
  </code></pre>
  <p>Is this correct?</p>
  <p>Thank you!</p>