Preparing for Design questions

Many companies including Amazon have a system design round.
I have collected some material to prepare for the same :

1) https://medium.com/@Pinterest_Engineering/sharding-pinterest-how-we-scaled-our-mysql-fleet-3f341e96ca6f#.4vmrlyad1

2) https://www.quora.com/What-are-Master-and-Slave-databases-and-how-does-pairing-them-make-web-apps-faster

3) https://en.wikipedia.org/wiki/Paxos_(computer_science)

4) https://en.wikipedia.org/wiki/Spanner_(database)

5) https://en.wikipedia.org/wiki/Shard_(database_architecture)

6) https://en.wikipedia.org/wiki/Partition_(database)

7) http://ksat.me/a-plain-english-introduction-to-cap-theorem/

8) https://www.interviewbit.com/courses/system-design

Hope this helps!!