Designing any scalable web architecture would be incomplete without investigating “load balancers”.  There used to be a time when selecting and installing load balancers was an art by itself. Not anymore. A lot of organizations today, use Apache web servers as a proxy server (and also as a load balancer) for the backend application clusters. [...]

Web page caching gets tricky once personalization is involved. Lets take twitter public_timeline for example which seems to be perfect for caching. Unfortunately when a user is logged in, it also shows the user’s information. Caching that particular page in its entirety, on the web server, in such scenarios, may not be an option. Another [...]