Evaluation of WhatsApp’s Design

Requirements compliance

Our non-functional requirements for the proposed WhatsApp design are low latency, consistency, availability, and security. Let’s discuss how we have achieved these requirements in our system:

• Low latency: We can minimize the latency of the system at various levels:

  • We can do this through geographically distributed WebSocket servers and the cache associated with them.

  • We can use Redis cache clusters on top of MySQL database clusters. ...