The Varnish Book
The Varnish Book is really the comprehensive, nitty-gritty technical “bible” for all things Varnish Cache 4 and Varnish Solutions.
Get familiar with Varnish VCL (Configuration Language), caching principles and become an expert in all things Varnish 4 with this manual.
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For the guide to Varnish 6, download Varnish 6 By Example here.
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