March 2003
Intermediate to advanced
312 pages
7h 12m
English
Content preview from HTTP Developer’s Handbook
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Cache Array Resolution Protocol
The idea of Cache Array Resolution Protocol (CARP) is to allow multiple caching proxies to function as a single proxy. Each HTTP response that is cached by the group is labeled with its URL and the identity of the cache that is storing it, although a message digest of this data is used to be more efficient and consistent.
Because cached resources are indexed by URL and the identity of the storing cache, any participating cache can use CARP to determine exactly where a copy of a particular resource is located rather than having to query several peers. This deterministic characteristic is one of the key advantages of CARP and is similar to the idea of cache digests.
The URLs cached by participating proxies are partitioned ...
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