Varnish Cache is an open-source reverse HTTP proxy that is used by millions of websites worldwide for web acceleration and content caching. When deployed on Alibaba Cloud, it can cache HTTP content to speed up delivery significantly (300 - 1000%!) and reduce backend server load by up to 99%. It does this by caching and storing a copy of the web content the first time a user visits, and then delivering it directly from the cache for future requests. This means your web service can stay fast and online even during busy periods, providing an excellent web experience to your visitors at all times. 

Varnish Cache is an all-in-one solution for web operations, and as well as a content cache and reverse proxy it can be a load balancer, API gateway, web server and SSL terminator. Varnish Cache also has a built-in edge computing logic called Varnish Configuration Language, or VCL, which lets you customize your caching setup completely. Use VCL to write policies that dictate how incoming and outgoing requests, cached objects and data retrieved from the origin server are handled and lets you optimize fully. 

The Varnish Cache instances on Alibaba cloud are pre-configured, making it easier and faster than ever to use. Using Varnish Cache in the cloud also means you don’t need to invest in hardware infrastructure or pay large upfront costs too.

Here you can download the new book: Varnish 6 by Example, an essential guide to all things Varnish 6, including tutorials for and modules across Varnish Cache and Varnish Enterprise.