Integrated adaptive anycast for content distribution

摘要

A system includes first and second cache servers a domain name server, and a route controller. The cache servers are each configured to respond to an anycast address. Additionally, the first cache server is configured to respond to a first unicast address, and the second cache server is configured to respond to a second unicast address. The router controller configured to determine wither the status of the first cache server is non-overloaded, overloaded, or offline. The route controller is further configured to instruct the domain name server to provide the second unicast address when the status is overloaded or offline, and modify routing of the anycast address to direct a content request sent to the anycast address to the second cache server when the status is offline. The domain name server is configured to receive a request from a requestor for a cache server address. Additionally, the domain name server is configured to provide an anycast address to the requestor when the status of the first cache server is non-overloaded, and provide the second unicast address to the requestor when the status of the first cache server is offline or overloaded.

主权项

1. A system comprising:
a memory that stores instructions; a processor that executes the instructions to perform operations, the operations comprising:
determining a status of a first cache server, wherein the status is selected from: a non-overloaded status, an overloaded status, or an offline status;instructing a domain name server to provide a unicast address for a second cache server when the status of the first cache server is determined to be the offline status; andmodifying, when the status of the first cache server is the offline status, routing of an anycast address to direct a content request that is sent to the anycast address to the second cache server.