Multicast mapped look-up on content delivery networks

摘要

A method and system for flexibly processing content objects is disclosed. A content object is stored on one of a plurality of storage devices. A request is received for the content object. Information corresponding to the requested object (e.g., a unique identifier) is transmitted to one or more content directories. A response is received from a first content directory indicating a location of the content object. The content object is requested from the first location, and at least part of the content object is received.

主权项

1. A content delivery network (CDN) having a plurality of points of presence (POPs) for populating content, the CDN comprising:
a mapper configured to determine popularity trends for a plurality of content objects, wherein:
the popularity trends for the plurality of content objects are characterized by a difference between a value of a popularity variable for a given content object, in the plurality of content objects, at a first time, and a value of the popularity variable for the given content object at a second time; andthe popularity variable of the given content object is based on historical request information; a policy store for storing a plurality of policies, wherein the plurality of policies comprises one or more policies for:
identifying a first content object from among the plurality of content objects for storage evaluation based on a popularity trend of the first content object; anddetermining a target number of copies of the first content object for storage in the CDN based on the popularity trend of the first content object; and a processor, coupled to the policy store, for adding copies of the first content object to or deleting copies of the first content object from the CDN according to the target number of copies.