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Fastly is a CDN provider that uses Varnish. By changing the CNAME of a sub domain, it is possible to serve a response from Fastly. If a Varnish cache record exists, this is served to the user, if not, Fastly makes a request to the web server (Rackspace) and saves the result for future requests. This allows us to serve all current Varnish requests through a CDN. The advantage of this is that the pages will be delivered much quickly in different locations around the global. Another advantage is that you are not reliant on a single Varnish server so there is less chance of suffering a complete loss of caching.


Soft Purge

There is an option to soft purge an item, This allows you to serve old content while the varnish record is updated in the background.

Fastly links


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