Varnish Cache

Varnish Cache is a popular – and powerful – open source HTTP engine/reverse HTTP proxy used by more than 3.4 million websites.

The cache is often the most critical piece of software for a web-based business. Varnish Cache is a powerful, open source HTTP engine/reverse HTTP proxy that can speed up a website by up to 1000 percent by doing exactly what its name implies: caching (or storing) a copy of a webpage the first time a user visits. Varnish visits your server once to cache the page, then all future requests for the same page will be served by Varnish. This means lightning-fast content delivery and fewer backend server resource requirements.

Varnish Software maintains stable releases of Varnish Cache and works closely with Varnish Cache Chief Architect, Poul Henning Kamp, on the development of the open source software.

Features and benefits

  • Speed and performance are the heart of Varnish
  • Savings in server infrastructure
  • Scalability – no matter the number of visitors or requests, Varnish helps your site match the demand
  • Protection against outages—if your server fails, Varnish continues to serve cached content
  • Flexibility – Varnish Configuration Language (VCL) builds customized solutions, rules and modules
  • Improved end-user experience

Who should use Varnish?

Anyone can use Varnish, but it is especially useful for businesses that value speed, performance, scalability, and want to save on server infrastructure.

Varnish is beneficial both to users who need basic functions and to very advanced users who have the expertise, time and resources to build customized modules.

For a more in-depth look at Varnish Cache, download the Varnish Book.

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