Although we've used to call support and request a higher capacity ELBs (you can't get this automatically), recently we stopped doing it recently and handle spik

Although we've used to call support and request a higher capacity ELBs (you can't get this automatically), recently we stopped doing it recently and handle spikes from 1,000 to 100,000 concurrent users within a couple of minutes without a sweat. By the way, many people are unaware, but CloudFront distributions also need to be upgrade to handle spikes similarly to ELBs.