1 When we last visited WhatsApp they’d just been acquired by Facebook for $19 billion.
2 Added a write-back cache so messages could be delivered before they had to be written to the filesystem.
3 Handling this level of growth with so few engineers is what Rick is most proud of: 40 million users per engineer.
트위터 반응

@jrogue: WhatsApp의 주목할만한 아키텍처 변화(영문) http://t.co/h6nJ1iID3q