Today is March 15th and that means it’s release day! Every year on March 15th and September 15th, a new version of Varnish Cache is released.

Varnish Cache is the open source version of Varnish and version 7.3 of the project becomes available today.

Recently, Varnish Technical Evangelist Thijs Feryn led a webinar covering Varnish Configuration Language (VCL), the unique programming language that powers all of our software, as well as the popular open source Varnish Cache. For those who weren’t able to attend the webinar, you can watch it here.  

Fastly VCL is a domain-specific programming language which has evolved from the Varnish proxy cache, which is part of Fastly's platform architecture. Varnish Enterprise VCL, instead, is specific to the Varnish Software solutions. There are some architectural similarities between Varnish Cache open source, Fastly and Varnish Enterprise, but as it is said, the devil’s in the details, hence this blog post.

The Varnish Controller is our administration solution for managing large Varnish Enterprise environments, offering provisioning, scaling and monitoring capabilities for Varnish clusters and multi-tenant environments. And now, we’re delighted to release Varnish Controller 4.1.0 to the world! See the release notes and change log here. This version of Controller adds features, fixes and improvements, including new tools for Traffic Router, the built-in solution for directing CDN traffic.