Exploiting Metadata of Absent Objects for proxy Cache Consistency

摘要

Caching at the Web proxy server plays an im- portant role in reducing the response time, the network traffic, and the load of Web servers. Many recent studies have pro- posed and examined the replacement and consistency policies for the proxy cache, which plays a central role in the performance of caching components. For better performance, they exploit various metadata of Web objects, such as the reference count, reference time, and modification time information of past behav- iors, to estimate the re-reference likelihood and freshness of the objects.