Recently, I was thinking about the black Friday or double 11 events in China. There are a lot of users rushing for the discount on the Amazon at the time of 00:00:00, which generate a lot of requests in a minute (millions of requests). How to design a system to handle this large amount of request in this short period of time, and also make sure the system to operate as usual?

ref: https://www.zdnet.com/article/the-technology-enabling-alibaba-to-sell-30-8-billion-in-singles-day-goods/