Using #Varnish So News Doesn’t Break Your Server - NYTimes.com
This mix-up resulted in a sudden burst of more than 300 requests per second to our machines — and we saw this burst all too clearly on our screens, because every home page load was hitting our machines (thankfully, it was a Friday afternoon and not election night). Three months earlier, I would have been swearing profusely at this point, trying to spin up new servers in time to avoid watching all my application servers groan and die. But that day I watched as all of the application servers remained unperturbed. The difference? Varnish.