There's some notes about how Whatsapp achieved that here [1], they attribute their capacity in part to Erlang's concurrency and in part to cloud hosting with So

There's some notes about how Whatsapp achieved that here [1], they attribute their capacity in part to Erlang's concurrency and in part to cloud hosting with SoftLayer. Amazon is the origin of SoftLayer's cloud services and single biggest reason one engineer can manage arbitrary numbers of servers/users: The popularization of the term can be traced to 2006 when Amazon.com introduced its Elastic Compute Cloud. [2] [1] http://research.dyn.com/2014/03/global-consumerwhatsapp/ http://research.dyn.com/2014/03/global-consumerwhatsapp/ [2] https://en.wikipedia.org/wiki/Cloud_computing#History_of_cloud_computing https://en.wikipedia.org/wiki/Cloud_computing#History_of_clo...