Varnish Cache stores content in pluggable modules called storage backends. It does this via its internal stevedore interface..
Also, what does Varnish cache?
Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x, depending on your architecture.
Subsequently, question is, is Varnish Cache free? Varnish Cache is an open source project written in C. The fact that it's open source means the code is also available online and the use of Varnish is free of charge.
Hereof, who uses Varnish Cache?
Varnish is used by websites including Wikipedia, online newspaper sites such as The New York Times, The Guardian, Gulf News, The Hindu, Corriere della Sera, social media and content sites such as Facebook, Twitter, Reddit, Spotify, Vimeo, and Tumblr. In 2012, 5% of the top 10,000 sites in the web used the software.
Does Varnish cache images?
Varnish Cache is a reverse proxy for caching HTTP, also sometimes known as an HTTP accelerator. It is most often used to cache content in front of the web server - anything from static images and CSS files to full HTML documents can be cached by Varnish Cache.
Related Question Answers
How do I know if varnish is working?
You should be able to see that Varnish is working on your site by inspecting the response headers and looking for that header. Or, enter your URL above and my tool will find it for you :-) header to ensure that the content being served is cached - indicated by a HIT value.Is varnish waterproof?
Varnish, a combination of resin, solvent, and drying oil, gives a hard-shell finish that resists scratches without yellowing. To waterproof wood that will be placed outdoors, choose marine varnish, which contains UV absorbers to resist sun damage.How do I remove varnish?
You can use a stiff-bristled scrub brush to remove varnish from fancy, curved details. Some of the stain may linger after scraping. To remove it, dampen a soft, fine-grade steel-wool pad with more paint stripper and rub it against the wood, following the wood grain, then wipe off the softened stain with a rag.What is varnish used for?
Varnish is primarily used in wood finishing applications where the natural tones and grains in the wood are intended to be visible. It is applied over wood stains as a final step to achieve a film for gloss and protection.What is varnish made of?
Varnish, liquid coating material containing a resin that dries to a hard transparent film. Most varnishes are a blend of resin, drying oil, drier, and volatile solvent. When varnish dries, its solvent portion evaporates, and the remaining constituents oxidize or polymerize to form a durable transparent film.When was varnish invented?
1.0 A Brief History of Varnish During the 16th century, varnishes were used regularly and in 1773, Watin's book on coatings gave formulations that are similar to those used today. The 20th century introduced the use of China Wood or Tung Oil, which was imported from China.Is varnish toxic?
The resins and solvents used in varnish are toxic if ingested. Many varnish products contain benzene, which is a known carcinogen that is highly flammable. The solvents in varnish are extremely pungent, and the fumes can cause drowsiness, headaches, skin irritation and dizziness.What is varnish VCL?
Varnish Configuration Language (VCL) is a domain-specific language designed for use in Varnish. VCL allows users to configure Varnish exactly how they see fit. It gives total control of content caching policies, HTTP behavior, and routing. The Varnish Book is the bible of VCL.What is CDN cache?
What is CDN caching? A CDN, or content delivery network, caches content (such as images, videos, or webpages) in proxy servers that are located closer to end users than origin servers. (A proxy server is a server that receives requests from clients and passes them along to other servers.)What is varnish Linux?
Varnish is a program that can greatly speed up a Web site while reducing the load on the Web server. According to Varnish's official site, Varnish is a "Web application accelerator also known as a caching HTTP reverse proxy".What is Guru Meditation Error 503?
A 503 error means that the web server trying to be reached is unavailable - this could be because it is overloaded, down for maintenence, or not fully functional for another reason.How does reverse proxy work?
A reverse proxy is a server that sits in front of one or more web servers, intercepting requests from clients. With a reverse proxy, when clients send requests to the origin server of a website, those requests are intercepted at the network edge by the reverse proxy server.What is varnish WordPress?
Varnish Cache / Nginx Proxy Cache is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. This plugin does not install Varnish/Nginx for you, nor does it configure Varnish/Nginx for WordPress. 
