[wp-hackers] Varnish and WordPress

Joseph Scott joseph at randomnetworks.com
Thu Aug 2 20:32:19 GMT 2007

On Aug 2, 2007, at 1:25 PM, Demitrious S. Kelly wrote:

> To the best of my knowledge varnish does not work as a content
> accelerator with wordpress. Because of the flow of information through
> wordpress blogs (last-in-first-out) the entire blog (or at least very
> large chunks of it) would need to be invalidated for every
> add/edit/delete action. Because of the mutable URI structure of
> wordpress it difficult to generate a complete list of URI/URLs that
> might have changed because of a given action. This, mixed with the  
> fact
> that (afaik) varnish does not allow wild card invalidations, only
> specific URI/URL invalidations, makes varnish less than ideal as a
> content accelerator for WP. We're working on a project called WPCP  
> which
> should alleviate this problem for very large shops for whom wp- 
> cache is
> too unruly. For now, wp-cache is still your safest bet.

Purging (invalidation) is one of the nice features of Varnish.  The  
FAQ (http://varnish.projects.linpro.no/wiki/FAQ) shows how to purge  
using the command line tool and via HTTP.  They use regexs so you can  
purge as much or as little of the cache as you want.

Joseph Scott

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