Free Sample
+ Collection
Code Files

Instant Varnish Cache How-to

Roberto Moutinho

Hands-on recipes to improve your website's load speed and overall user experience with Varnish
RRP $14.99

Want this title & more?

$12.99 p/month

Subscribe to PacktLib

Enjoy full and instant access to over 2000 books and videos – you’ll find everything you need to stay ahead of the curve and make sure you can always get the job done.

Book Details

ISBN 139781782160403
Paperback56 pages

About This Book


  • Learn something new in an Instant! A short, fast, focused guide delivering immediate results.
  • Connect and health-check application servers with Varnish Cache
  • Load balance requests across clustered servers
  • Define caching policies and request/response workflow


Who This Book Is For

This book is aimed at system administrators and web developers who need to scale websites without tossing money on a large and costly infrastructure. It’s assumed that you have some knowledge of the HTTP protocol, how browsers and server communicate with each other, and basic Linux systems.

Table of Contents

Chapter 1: Instant Varnish Cache How-to
Installing Varnish Cache (Must know)
Varnish Cache server daemon options (Must know)
Connecting to backend servers (Should know)
Load balance requests (Should know)
The Varnish Configuration Language (Should know)
Handling HTTP request vcl_recv (Should know)
Handling HTTP request vcl_hash (Should know)
Handling HTTP request vcl_pipe and vcl_pass (Should know)
Handling HTTP response vcl_fetch (Should know)
Handling HTTP response vcl_deliver (Should know)
Handling HTTP response vcl_error (Should know)
Caching static content (Should know)
Cookies, sessions, and authorization (Become an expert)
HTTP cache headers (Should know)
Invalidating cached content (Should know)
Compressing the response (Become an expert)
Monitoring the hit ratio (Become an expert)

What You Will Learn


  • Install and configure Varnish Cache
  • Connect application servers to Varnish Cache
  • Load balance requests
  • Request and response workflow inside the Varnish
  • Caching and compressing static content
  • Session and cookie handling
  • Invalidating stale content


In Detail

When you're doing business on the Web, every second counts. 80 percent of the end user response time is spent on downloading content to the browser, and Varnish Cache is here to help you solve this problem in a simple and effective way.

"Varnish Cache How-to" is a practical, hands-on guide that will take you from beginner to advanced, improving your website speed and dropping the bounce and page abandonment rates of your website. With easy-to-follow recipes, this book will help you take advantage of caching your application server’s response to avoid a duplicated workload.

This book will take you from the installation of the Varnish Cache server to defining caching policies, the normalization of static content, and a final production-ready fast and scalable cache server.

You will learn to balance requests across servers based on input data or pre-defined settings, create persisted sessions (sticky sessions), compress static content, and modify requests. If you want to improve the speed and also provide a fail-over mechanism to achieve a fast and available website, then this book is for you.

By the end of this book, you’ll learn how to scale and improve the user‘s experience by providing a fast and available website.


Read More

Recommended for You

Cacti 0.8 Beginner's Guide
$ 26.99
Cacti 0.8 Network Monitoring
$ 15.75
Joomla! Cash
$ 12.60