Varnish Hash

[Ricardo Newbery]

On Dec 6, 2007, at 2:34 PM, Poul-Henning Kamp wrote:

> In message <d4284sx3kke05yf.061220071449 at torlen.net>, Erik writes:
>> Just to make this clear, does varnish identify an object like this  
>> in vcl_hash?
>>
>>         sub vcl_hash {
>>             set req.hash += req.url;
>>             set req.hash += req.http.host;
>>             hash;
>>         }
>
> Well, mostly.  That is the primary identification, but each match
> can have multiple different objects, depending on the Vary header
> and ttl.


Apologies for butting into this thread...

Multiple objects depending on ttl?  Can you elaborate?

Also, how are purges done when variations exist?  I'm guessing all  
variations get purged.  Is this correct?

Ric