Whatsapp Scaling
1) https://vimeo.com/44312354
2) http://www.erlang-factory.com/upload/presentations/558/efsf2012-whatsapp-scaling.pdf
3) http://highscalability.com/blog/2014/2/26/the-whatsapp-architecture-facebook-bought-for-19-billion.html
4) http://lanyrd.com/2014/erlangfactory/scwqrt/
5) http://www.erlang-factory.com/static/upload/media/1394350183453526efsf2014whatsappscaling.pdf
