Youtube is said to be pushing about 25 petabytes per month which is about 77 Gbps sustained data rate on an average. The bandwidth usage at the peaks would be even higher. Thanks to Limelight networks, Youtube doesn’t really need to scale or provision for that kind of bandwidth and based on the some reports [...]

A few weeks ago the company I work with noticed a weird problem with its CDN (Content Delivery Network) provider. They noticed that HEAD requests were being responded to by the CDN edge nodes using objects in the cache which had already expired. Whats worse is that even after an explicit content expiry notification was [...]