What does varnish cache server mean?

rwsorensen

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I know some websites using varnish cache server but don't know what purpose it is for. What is the difference between using varnish and caching HTML pages in memcached?
 

tarunap

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Check [URLnf="https://www.varnish-cache.org/docs/4.0/reference/vcl.html"]this Link[/URLnf] for More Information on Varnish
 

m3server

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Varnish caching is proxy caching, best for caching content and traffic to keep it from hitting your server completely. Memcached pages still handle tcp/http/php traffic at the origin server. We prefer nginx for caching off server for a more dramatic reduction in server load and bandwidth.
 

digitalberg

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Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy(open Source). You install it in front of any server that speaks HTTP and configure it to cache the contents.

Varnish Cache Portfolio
Varnish is used by high-profile, high-traffic websites including online newspaper sites such as The New York Times, The Guardian, The Hindu, Corriere della Sera, social media and content sites such as Wikipedia, Facebook, Twitter, Vimeo, and Tumblr. Of the Top 10K sites in the web, around a tenth use the software. - Source WiKi.

How to install please click here: https://www.varnish-cache.org/docs/trunk/tutorial/

Varnish Server Flexibility
One of the best features we came across in Varnish Cache, in addition to it's performance, is the flexibility of it's configuration language, VCL. VCL enables you to handle the HTTP requests the way you want, what to cache, how to cache it, modifying HTTP headers etc. etc.
 

ElixantTechnology

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Varnish is pretty intense, and with a properly configured VCL Varnish can out perform other options such as Nginx and even LiteSpeed. The problem is that there aren't many preconfigured VCLs on the market available so it can take quite some time to get together a good VCL. Some companies, like Unixy can provide you with a functioning VCL, but even still it can take some work before everything runs perfectly.

We used to utilize Nginx for Reverse Proxy, but when we faced a decision on better performance we chose LiteSpeed over Varnish mainly because it was the most stable and widely adapted solution at the time.
 
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