Google have concluded that the two hour Gmail shut down on Tuesday was the result of a miscalculation regarding the capacity of its system. Millions of Gmail users checking in for entertainment news to business updates were left stranded. The problem was caused by a classic cascade in which servers were jammed with traffic in rapid succession. Google say that, the problem began when it took several Gmail servers offline for maintenance, a routine procedure that normally is transparent to users. However, the twist this time around was that Google had made certain modifications to the routers that direct Gmail traffic to servers with the intentions of improving reliability. These slight modifications obviously backfired and cost Google dearly. In a statement posted  [...]