• Understanding the Process Flow for Varnish Caching
    Technology

    Understanding the Process Flow for Varnish Caching

    Internet is the best medium to find out the required information. We all know the amount of time we spend on the internet, then be it collecting information or enjoying a stand-up comedy online. But, with increasing users on a website, sometimes we face problems like slow loading of the website, webpages crashing down due to scalability issues and many more.

    To tackle this problem, we came up with a solution known as cache memory. The process of storage of data in a cache (temporary storage unit) is known as caching. Caching is the most important tool when it comes to website optimisation. Without any caching system, the website cannot be claimed to be perfectly optimised.

    There are different types of cache memories used for different purposes. For example, a page cache stores the entire HTML code of a page. Then there is an essential type of cache known as a reverse proxy cache. Reverse proxy cache is implemented on the server-side that stores information on the client’s server.

    We will be focussing on this reverse proxy server and understand a specific type reverse HTTP proxy known as Varnish Cache.

    Reverse Proxy

    Proxies or Proxy servers are placed in between the client and server. It filters the requests sent by the user to a specific web page based on a special set of rules.

    Companies hide certain information on the website or block social media websites, so the productivity of the employee is not hampered. This is known as a forward proxy.

    In contrast, a reverse proxy is placed between the company’s web server and the Internet. So, whenever Internet requests access to the company’s website, the reverse proxy server will filter the request before reaching the site.

    There are many reverse proxy servers used these days to speed up the process of calling web pages. One of them is the Varnish Cache.

    What is Varnish Cache?

    Varnish cache is a reverse HTTP proxy also known as a web accelerator or front-end accelerator. It requires a dedicated server like NGINX or Apache and is not a standalone solution. You can capture both dynamic and static capture. Also, it helps in enhancing the server performance of your website.

    Understanding the workflow of Varnish Cache

    Again, before moving straight to the Varnish Cache, let us understand how it used to be and how Varnish Cache makes a difference when it comes to …