OpenCart Varnish Cache module facilitates the store admin to set configurations for setting up varnish cache configurations, such as Host Name, Port Number, Access IP List, First Byte Timeout, Between Byte Timeout, Connection Timeout, Backend Polling, etc.

Inculcating this feature shall provide faster page load times, thus enhancing user experience for the customers and even improvising the SEO of the website.

Note: For installing the Varnish Cache, one can click here.










Use Case:

A faster loading website is key to generate real sales and revenue. Obviously, such websites will have a larger traffic count compared to other websites.

Therefore, business entrepreneurs nowadays are striving to integrate ways and means to enhance the speed and thus deliver a swift website page loads to the users.

One such way is to integrate the Varnish Cache, which is installed in between the Client and the Server (Apache), which is the prime component that adds on to improvise the SEO factor of the website thus enhancing the user experience for the customers.

Features:

• The admin needs to set the Host IP and also the Port Number of the server.
  
• An Access List, which includes a list of IP's, which takes in the IP of the default host when not chosen by the admin. 
  
• The admin has to configure the First Byte and Between Byte timeouts (in secs).
  
• A Connection Timeout is set within which the server must send the response to the varnish. 
  
• A cache time to live is set by the admin which stores the copy of your website's resources. 
  
• The admin may even enable the Backend Polling where the client requests are sent to the server if the varnish cannot respond to the request. 
  
• Varnish help reduce network bandwidth consumption as well as instigate faster page load times. 
  

Workflow:



Varnish FPC Connectivity: with the Opencart’s Website

The users can simply log-in to an OpenCart website so as to monitor its connectivity with the Varnish Cache.



To examine the connectivity of any of the website pages with the Varnish Cache, the user needs to inspect the respective website’s page.

For instance, to examine the website's homepage connectivity with varnish cache, the user will have to inspect the homepage and thereafter navigate to Network > Headers > All > Page Path. 

This way the user will be able to check whether it is a “Hit or a Miss.”

In the image below it displays a Hit against X-Cache which means the homepage of the website is connected with the Varnish Cache.



An Alternate Method: to Check the Connectivity

Furthermore, the users can also type the following command so as to check the varnish connectivity of a website's homepage.

Command:
curl -I http://ocvarnish.webkul.com/index.php?route=common/home












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