A word about Varnish

Varnish is a Web application accelerator or ‘reverse proxy’. It’s installed in front of the Web server to handle HTTP requests. This way, it speeds up the site and improves the performance significantly. In some cases, it can improve the performance of a site by 300 to 1000 times.

It does this by caching the Web pages and when visitors come to the site, Varnish serves the cached pages rather than requesting the Web server for it. Thus the load on the Web server reduces. This method improves the site’s performance and scalability. It can also act as a failsafe method if the Web server goes down because Varnish will continue to serve the cached pages in the absence of the Web server.

With that said, let’s begin by installing Varnish on a VPS, and then connect it to a single NGINX Web server. Then let’s add another NGINX Web ser server so that we can implement a failsafe mechanis mechanism. This will accomplish the performance g goals that we stated. So let’s get started. Fo For the rest of the article, let’s assume that you are using the Centos 6.4 O OS. However, we have provided

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