Re: [squid-users] Some queries about cache_peer

> Hello list,
>
> I tried to set up cache_peer, but i could not understand that it has setup
> or not. Please give some inputs.
>
> Scenario:-
>
> I have setup three proxy-servers.squid 3.0.7 Stable
> proxy1 192.168.99.134
> proxy2 192.168.99.135
> proxy3 192.168.99.121
>
> Lan Computer 192.168.99.23.
>
> On my Lan Computer, i have configured proxy in my browser as
> 192.168.99.134 ie proxy1. All request first go to proxy1.
>
> In Proxy1 squid.conf:-
> cache_peer 192.168.99.135 parent 3128 3130 proxy-only default
> cache_peer 192.168.99.121 parent 3128 3130 proxy-only
>
> cache_peer_domain 192.168.99.135 .com
> cache_peer_domain 192.168.99.121 .net
>
> In proxy2 and proxy3 no cache_peer is configured.
>
> I can browse the web. But i didnt understand the working. I have some
> queries regarding this scenario:

> If the page is not in any of the proxy server, then which proxy server
> will go to internet and fetch for the user. I mean if user access any
> ".net" domain then the request will come to the proxy1 first, it will
> query to the proxy3, if its there it will be delivered else the page will
> be fetched from the internet ,Same is for the ".com" domain right?

Usually. If netdb/icmp has been enabled squid will keep records of
response times and go to whichever of peer/web responds fastest. thinking
fastest available service is usually best to use.

Check your access.log for info on which is being selected for each request.

> Then my question is,
> 1) which server will query to the internet for the page which is not in
> the cache ie ".net" dedicated server or the main proxy1 server?

Under only cache_peer_domain, maybe both. Use 'never_direct' to force
requests to go via peers.

> 2) The new page will be written to the which cache, proxy1 or
> proxy2/proxy3

'proxy-only' prevents caching at proxy1 if request came from peer. If
request came from web DIRECT then it can be cached at proxy1 and used
later.

Amos
Received on Thu Jul 31 2008 - 04:01:34 MDT