This document discusses gumi's use of Amazon Web Services (AWS) for their social game platform. Some key points include: - Gumi migrated their platform to AWS in 2011 to take advantage of scalability, availability, and pay-as-you-go pricing. - Their AWS architecture includes load balancers, EC2 instances, RDS for databases, memcached for caching, and Tokyo Tyrant for key-value storage. - Using AWS