"An Analysis of Facebook Photo Caching" [1] discusses CDN usage and complements the original Haystack paper [2] [3] well. [1] http://www.cs.cornell.edu/~qhuang

"An Analysis of Facebook Photo Caching" [1] discusses CDN usage and complements the original Haystack paper [2] [3] well. [1] http://www.cs.cornell.edu/~qhuang/papers/sosp_fbanalysis.pdf http://www.cs.cornell.edu/~qhuang/papers/sosp_fbanalysis.pdf [2] https://www.usenix.org/legacy/event/osdi10/tech/full_papers/Beaver.pdf https://www.usenix.org/legacy/event/osdi10/tech/full_papers/... [3] http://muratbuffalo.blogspot.com/2010/12/finding-needle-in-haystack-facebooks.html http://muratbuffalo.blogspot.com/2010/12/finding-needle-in-h...