Scaling Caching at Etsy: A Story of handlings 1,000,000's of lookups / sec

Etsy optimised 1,000,000,000,000's of cached data handlings 1,000,000's lookups/sec Story of Consistent Hashing with a secret sauce. Etsy, uses memcached (to cache db queries, expensive calculations etc) and Varnish (to cache internal HTTP requests)...