Then all future requests for exactly similar content will be served from the cache. It receives requests from clients and forwards them to the backend once to cache the requested content (store files and fragments of files in memory). Its main purpose is to make your applications load faster, by working as a caching engine. Varnish acts as a middleman between Nginx and clients but with some performance benefits. And it delivers the response from the origin server to clients. Being a reverse proxy simply means it is software that you can deploy in front of your web server (which is the origin server or backend) such as Nginx, to receive clients’ HTTP requests and forward them to the origin server for processing. Varnish Cache (commonly referred to as Varnish) is an open-source, powerful, and fast reverse-proxy HTTP accelerator with modern architecture and flexible configuration language.
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