A recharacterization
Thursday, February 18, 2010
10:30 AM
A recharacterization of control
Load average LCPU is proportional to  time-in-system Wrequest.
Wrequest is hard to measure, while LCPU is easy to measure. 
So, we watermark LCPU, and use that to provision to control Wrequest and thus P=Wrequest+tnetwork! 
Note that the load average on a specific machine is representative of the load average on all machines, provided that the servers are all the same and switching is flowless round-robin.