Resource invalidation in a content delivery network
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United States of America Patent
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Nov 15, 2011
Grant Date -
Sep 4, 2008
app pub date -
Oct 31, 2007
filing date -
Feb 10, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A repeater server in a content delivery network (CDN) maintains a list of resources that are no longer valid. When the server gets a request for a resource, it checks whether that resource is on the list, and, if so, it replicates the resource from a content provider's content source such as an origin server. Otherwise the repeater server tries to serve a copy of the requested resource or to obtain a copy from another location in the CDN.
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