This tutorial is intended for system administrators wanting to install Varnish on CentOS 6. The reader should know how to configure a web server or application server and have basic knowledge of the HTTP protocol. Once finished the reader should have a basic Varnish cache up and running with the default configuration.
Varnish is a web application accelerator. You install it in front of your web application and it will speed it up significantly.
Varnish web application accelerator homepage: https://www.varnish-cache.org