Global constraint-based content delivery network (CDN) selection in a video streaming system

A non-transitory computer-readable storage medium containing instructions, that when executed, control a computer system to be operable for:

• receiving a request for a video;
• receiving a ranking of a plurality of content delivery networks for the request;
• receiving historical scores for respective content delivery networks in the plurality of content delivery networks from rankings in historical playback sessions;
• receiving global constraints for the plurality of content delivery networks, wherein the global constraints define an allocation for respective content delivery networks;
• selecting a content delivery network using the global constraints, the ranking, and the historical scores, wherein a first score for the content delivery network is altered to a second score, and the second score is used in the selecting of the content delivery network;
• and
• outputting the content delivery network that is selected for the request.

A method comprising:

• receiving, by a computing device, a request for a video;
• receiving, by the computing device, a ranking of content delivery networks for the request;
• receiving, by the computing device, historical scores for respective content delivery networks in a plurality of content delivery networks from rankings in historical playback sessions;
• receiving, by the computing device, global constraints for the content delivery networks, wherein the global constraints define an allocation for respective content delivery networks;
• altering, by the computing device, a first score for a content delivery network in the ranking to a second score based on at least one of the global constraints and at least one of the historical scores;
• selecting, by the computing device, a content delivery network from the ranking, wherein the second score is used in the selecting;
• and
• outputting, by the computing device, the content delivery network that is selected for the request.