DYNAMIC REQUEST REROUTING

摘要

A point of presence includes edge servers having IP addresses and storing content, a switch/router that receives and forwards requests for content to the edge servers, a health monitoring server that gathers health information from the edge servers, and a dynamic request rerouting (DRR) server. The DRR server is connected with each of the edge servers. If the DRR server obtains a determination that one of the edge servers is down, it advertises a route including the IP address of the down edge server to the switch/router. The switch/router forwards a request for content, originally addressed to the down server, to the DRR server. The DRR server forwards the request to a working server that stores the content. The working server sends the content to the DRR server, the DRR server forwards the content back to the switch/router, and the switch/router responds to the original request with the content.

主权项

1. A point of presence for a content delivery network that supports dynamic request rerouting, comprising:
a plurality of edge servers that store content objects, each of the edge servers being addressable through an IP address; a switch/router that is operatively configured to receive a request for requested content and forward each such request to an appropriate one of the edge servers; a health monitoring server that gathers health information from each of the edge servers; and a dynamic request rerouting (DRR) server that is operatively connected with each of the plurality of edge servers, such that upon the DRR server obtaining a status determination that one of the edge servers is not operating properly, based on the health information:
the DRR server advertises a route that includes the IP address of the one of the edge servers that is not operating properly, to the switch/router,the switch/router forwards an original request for requested content that was originally addressed to the one of the edge servers that is not operating properly, to the DRR server,the DRR server forwards the request to one of the edge servers that is operating properly and stores the requested content,the one of the edge servers that is operating properly responds by sending the requested content to the DRR server;the DRR server forwards the requested content back to the switch/router; andthe switch/router responds to the original request with the requested content.