title: Scripting and rrdtool
body: <p>I have a case where I have collected a lot of SNMP data and stored it via rrdtool. (Using OpenNMS)</p>
  
  <p>My goal is to determine, among hundreds of servers, which ones haven't had memory usage exceed a certain amount within the past six months. (say, 64 gigs) </p>
  
  <p>My plan was to write a bash script to extract and process the data from rrdtool, but unsure how to start. This seems like a common enough task that I felt I should ask on here if anyone has any ideas. </p>
  
  <p>Thanks!</p>