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Re:Google CDN Beta is already one of the fastest CDNs by cortesoft on Monday April 18, 2016 @06:10PM (#11523504)
Probably each CDN does it differently... but the one I know about does the second.... so it goes LB, first webserver on random node, and that first webserver knows where to grab the content from the second webserver on the proper node that has the content.
Re:Google CDN Beta is already one of the fastest CDNs by tsmith84 on Monday April 18, 2016 @07:18PM (#11523789)
Most CDN have a pile of patents that show how they do their cache hierarchy.

-Ex CDN worker