Popularity-based selective replication in content delivery network

摘要

A client requests an object at a first server in a content delivery network (CDN), the request having been directed to said first server regardless of whether the first server has the requested object; When the first server does not have a copy of the requested object, it selectively replicating the requested object on the first server. The replicating is based at least in part on a measure of popularity of the requested object, wherein the requested object is not replicated to the first server when the measure of popularity of the requested object does not exceed a popularity threshold.