Newbie : Static content caching

Anup Shukla anup at iamcool.net
Mon Jun 11 11:19:54 CEST 2007


Hello all,
Please accept my apologies for posting this without "complete" 
understanding about varnish.

The reason for the static content not being cached was "cookies".
Everything is well and good after a slight tinkering of the 
configuration file.

I, again, apologies for not being responsible enough before posting.
Just that, in this case, the light flickered, almost immediately after i 
hit the send button.

Thank you.

Anup Shukla wrote:
> Hello all,
> 
> I have been using Varnish with its "default configuration" for quite 
> sometime now.
> Absolutely nothing has changed except for the backed servers port number 
> (set to 8000).
> 
> Needless to say that it has been performing brilliantly and has reduced 
> the load on our webservers considerably.
> 
> Just noticed something strange though.
> Before i explain further, please let me clarify that i am not an expert 
> in caching by any standard, so this happens to be more of a newbie question.
> 
> I am running varnish and the backend apache on the same server.
> The backend listens on the loopback address while varnish listens on the 
> interface facing the load balancer.
> 
> If i request, say for example, a static jpeg, i assume that the first 
> request will be served by the webserver via varnish, and all later 
> requests would be served by varnish, without asking for it from the 
> webserver, that is till the object exceeds its lifetime in the cache.
> 
> What i observe is this:
> the request for the jpeg is sent to the webserver everytime, the 
> webserver send the entire content to varnish, and varnish sends a 304 
> Not Modified to the client browser.
> 
> Is this the expected behaviour?
> Do i need to do some VCL'ing to get it work the way i expect?
> 
> Any help or pointers will be very much appreciated.
> 
> Thank you.
> 
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