Connection digest for accelerating web traffic

摘要

In various aspects, provided herein are systems, methods and computer-program products for delivering content objects over the Internet from a content delivery network to end-user systems. The systems, methods and products described herein optionally utilize one or more techniques for reducing the delay associated with obtaining non-cached content objects from their respective origin servers, including by re-using existing open connections, by making use of a TCP hand-off technique and by transmitting updates to system digests simultaneous with the exchange of keepalive signals between servers.

主权项

1. A system for delivering content objects over the Internet from a content delivery network to end-user systems, comprising:
a first server, wherein the first server is configured to:
receive a request for a content object, wherein:
the request is to deliver a content object to an end-user system;the request is from an end-user system;the first server is one of a first plurality of servers in a first content delivery network having a first plurality of points of presence (POPs); andthe first content delivery network delivers content over the Internet to end-user systems;determine that the content object is not cached by the first server;determine that the content object is to be requested from an origin server; anddetermine that the first server either has no open connection with the origin server or that the first server has an open connection with the origin server with limited performance; and a cache for storing a connection digest, wherein:
the connection digest tracks connection information of a second server with the origin server;the second server is one of a second plurality of servers in a second content delivery network having a second plurality of POPs; andthe second content delivery network delivers content over the Internet to end-user systems; the first server being further configured to:
query the connection digest; andreceive from the query a result identifying that the second server has an open connection with the origin server.