Self-adjusting tiered caching system to optimize traffic performance and origin offload

摘要

A tiered caching system (e.g., in an overlay network such as CDN) wherein SWR at an edge server therein is automatically set (preferably based on request rate), while SWR at a parent server therein has its SWR set at or near 0. Collectively, these SWR settings provide for a self-adjusting tiered caching system that optimizes both end user performance and the origin traffic offload

主权项

1. A system associated with an origin server at which content to be delivered to a set of client machines is published, comprising:
first and second computing machines each having a hardware processor, and computer memory; an edge server process executing in the hardware processor of the first machine; a forward server process executing in the hardware processor of the second machine; the edge server process having computer program instructions stored in the computer memory and executed in the hardware processor of the first machine to compute and enforce a stale-while-revalidate (SWR) cache-control value set to a first SWR value, wherein the first value as a function of rate of requests from the set of client machines received at the edge server process; and the forward server process having computer program instructions stored in the computer memory and executed in the hardware processor of the second machine to enforce a SWR set to a second SWR value.