In a recent presentation, a Google Engineer said that Google is getting ready to manage 10 Million servers, as a “cloud computing” future seems to be on the horizon. The sheer number of servers wasn’t the main focus. The more interesting point was that Google wants to have the ability to shift the workload in real-time, possibly depending on energy cost. The idea is to move the workload in areas of the world where electricity is cheaper at any given time. It’s a “follow the moon” strategy based on the fact that electricity is cheaper at night. There are also latency and bandwidth considerations thatshould be taken into account.