Technology... is a queer thing. It brings you great gifts with one hand, and it stabs you in the back with the other.
-- C. P. Snow, New York Times, 15 March 1971
You can't control what you can't measure.
-- Tom DeMarco, Controlling Software Projects: Management, Measurement, and Estimates, 1982.
Design for 20x capacity. Implement for 3x capacity. Deploy for ~1.5x capacity.
-- Martin L. Abbott & Michael T. Fisher, Scalability Rules: 50 Principals For Scaling Web Sites, 2011