How many servers does a site like Yelp or foursquare require with their level of traffic?

Answer (1 of 3): ShopSavvy, with more than 7.5 million users, allows users to scan barcodes to get prices from local and online retailers. Our users are adding product pictures at about 2 times per minute and other product/retailer data at about 10 times per minute. Each scan is like a 'check in'...

[Ryu-Higa]

なるほど。だからQuoraで迅速な回答が来たのか。http://b.qr.ae/hNVkvRRT @Doubles9124 Foursquareは全社員でQuoraで回答する方針を取ってるみたい。