About the material

This book is part of Varnish Software’s (http://www.varnish-software.com) official training material for Varnish 3.

The material is primarily written to be used in a classroom context. In the classroom, each sub-chapter is a slide and the participants gets a printed version with extra information. The documentation you are reading will reflect that structure.

The training material evolves constantly. Some chapters are more evolved than others, which a course instructor usually compensates for by live demonstrations or more in-depth discussion.

All the VCL code examples are verified for syntax-correctness frequently (semi-automatically). This does not, however, guarantee that they do what they are supposed to do, only that it is correct VCL syntax.