Welcome to the Varnish project

Varnish is a state-of-the-art, high-performance HTTP accelerator. It uses the advanced features in Linux 2.6, FreeBSD 6/7 and Solaris 10 to achieve its high performance.

Some of the features include

  • A modern design
  • VCL - a very flexible configuration language
  • Load balancing with health checking of backends
  • Partial support for ESI
  • URL rewriting
  • Graceful handling of "dead" backends
  • more features...

Varnish is free software and is licenced under a modified BSD licence. Please read the introduction to get started with Varnish.

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Trouble, Errata and things you should know

Here is our running log of things you probably want to know

News

2009-11-09 Varnish 2.0.5 released

Varnish 2.0.5 has just been released. This release contains multiple changes, amongst them:

  • Performance improvements, particularly on Linux.
  • Implement support for HTTP continuation lines
  • Handle illegal responses from the backend better by serving a 503 page rather than panic-ing
  • Add backtrace to assertion errors. This requires Varnish to be installed unstripped
  • Consume less memory when processing ESI
  • Better standards compliance with If-None-Match support and emitting more headers on 304 responses
  • Add a FetchError? log tag which makes it easier to understand why a backend fetch failed.

There are some old news as well.

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