- •  Master Slave : https://www.quora.com/What-are-Master-and-Slave-databases-and-how-does-pairing-them-make-web-apps-faster
- •  Real life example of scaling using MySQL : https://medium.com/@Pinterest_Engineering/sharding-pinterest-how-we-scaled-our-mysql -fleet-3f341e96ca6f
- •  https://en.wikipedia.org/wiki/Paxos_(computer_science)