Is there any straightforward record/poll of long term load record instead of the usual 1,5,15 minute load values?
Background: Trying to convince faculty that current cluster solution is underutilized XX% of the time and could be used for BOINC / etc during periods of 'silence'
Check out Cacti and RRDtool. You can use them to poll, record, and display aggregated results as graphs the performance of just about anything on a server. There are plenty of templates available to get you started recording server data.
From RRDtool's webpage:
From Cacti's webpage:
You could install Munin on it.