You have one huge file coming in over a constrained link. How do you distribute it to thousands of machines?

To distribute a large file over a constrained link to many machines, first download the file to a central staging server. Then, leverage a peer-to-peer (P2P) distribution method, similar to BitTorrent, where machines can download chunks of the file from the staging server and from each other. This avoids overwhelming the constrained link by having each machine download the entire file independently.