[wp-hackers] Varnish and WordPress

[Joseph Scott]

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
http://joseph.randomnetworks.com/