tl;dr Listicle of five service layouts for different horizontal and vertical scaling. Provides a paragraph about each and pros/cons. Useful if you only have five minutes to learn about the following terms; not, if you've already spent five minutes learning about the following terms.
3 comments
[ 3.1 ms ] story [ 15.2 ms ] thread1 Everything On One Server
2 Separate Database Server
3 Load Balancer (Reverse Proxy)
4 HTTP Accelerator (Caching Reverse Proxy)
5 Master-Slave Database Replication
https://github.com/kahun/awesome-sysadmin
There are many, those will lead you to some great resources.