Caching Servers

How do caching servers work?

Cach servers work by saving a user's request and then serving that saved request to other users when they call the same endpoint.

  • The server only gets called if the response is not found in the caching server.

A cache key: is an index entry that uniquely identifies an object in a cache.

The caching server determines if two requests are identical using the cache key.

Example

  • “user 1” requests the “example.com/kop?somthing=ok” -> response not found in the caching server -> forwarded to the web server answering the response.

  • users 2 and 3 make the same request -> response found in the caching server -> web server not contacted -> old response shown instead.

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