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.<p>1 Everything On One Server<p>2 Separate Database Server<p>3 Load Balancer (Reverse Proxy)<p>4 HTTP Accelerator (Caching Reverse Proxy)<p>5 Master-Slave Database Replication