Serve only from cache

[Patricio A. Bruna]

Hi, 
Is possible to serve the content only from cache and no go to look for it on the backend. 
I mean, if we are doing an update to a web site we want the clients only see what is on the cache, the old site, and when the update is ready start showing the new site. 

Thanks 


------------------------------------ 
Patricio Bruna V. 
IT Linux Ltda. 
http://www.it-linux.cl 
http://wiki.itlinux.cl 
Fono : (+56-2) 333 0578 
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