Link: Read-After-Write Consistency in Amazon S3

Jul 28, 2011   #aws  #s3 

The engineering challenges in providing read-after-write consistency in a smaller geographical area are greatly magnified when that area is expanded. The fundamental physical limitation is the speed of light, which takes at least 16 milliseconds to cross the US coast-to-coast ( that’s in a vacuum – it takes at least four times as long over the internet due to the latency introduced by routers and switches along the way).

» It’s amazing that we have technologies that are limited by the speed of light. Who’d have thunk?