Patent ID: 8682968

Claim:
A content delivery network (CDN), comprising: a first-level CDN node that includes a first CDN media server and a first CDN content storage, and is configured to provide content for a user, wherein the first CDN media server generates a first content index corresponding to a logical storage unit in the first CDN content storage by mounting a logical storage unit in the first CDN content storage; and a second-level CDN node that includes a second CDN media server and a second content storage, and interconnects with the first-level CDN node, wherein: the first CDN media server accesses the content in the second CDN content storage by using an IP (Internet Protocol) layer storage access protocol; wherein the first-level CDN node includes one of an edge node and a backbone node; wherein the second-level CDN includes one of a backbone node and a centre node, and, wherein the second-level CDN node is an upper-level node of the first-level CDN node.