I am interested in how Wikipedia handles its large load so quickly across the globe. Is Wikipedia using a commercial CDN solution, or something else?I did search about this topic, but because of the nature of what search engine users are commonly interested in, search results only return documentation about CDNs.A CDN finder also did not return any results.I had a quick look at The Wikimedia Meta Wiki: Wikimedia Servers, but it is stated that the article is quite outdated, but gives the hint that Wikimedia is not using any corporate solution.
What is the content delivery network of Wikipedia?
wikipedia
If you look at the HTTP response headers for Wikipedia you can see they are distributing the load across two different subdomains: eqiad.wmnet and esams.wmnet.com. They have a little bit of info about it on the Wikipedia CDN page.Most likely this is an in-house CDN, built by them.If you are looking for a CDN I recommend checking out CDN Comparison. Side note: As of May 4th, 2016 they also are using HTTP/2.