Re: [squid-users] Re: Commercial Squid tweak speeds things up significantly!

Il 29/11/2011 14:18, RW ha scritto:
> On Tue, 29 Nov 2011 10:52:58 +0100
> Marcello Romani wrote:
>
>> I'm no expert (just a few squid deployments) but that doesn't make
>> any sense to me.
>>
>> "caches the content in a normal way", i.e. on a cache miss it fetches
>> the object from the net and stores it for other clients, while on a
>> cache hit it serves the file from its local depot (I'm
>> oversimplifying here).
>>
>> "but once a client gets a cache miss, then their Squid allows the
>> client to fetch the record" hmmmm....
>> "Once the object is fetched by the client, Squid intercepts it and
>> stores the object for the other clients."
>>
>> How can squid "intercept" a file _after_ it's been downloaded
>> _directly_ from a client, if that file doesn't pass through squid
>> itself ?
>
> As I understand it there are 2 servers, "Web Cache" and one or more
> squid instances. WC passes the request to squid, which serves the
> object or passes it back to the parent cache part of WC.
>
> I think that one reason for this is that WC controls what goes into
> each squid cache for policy reasons.
>
> What's less clear is precisely how misses are handled. It might just be
> a confusing description of :
>
> "WC front-end proxy"<--> Squid<--> "WC parent cache"
>
> But what it seems to be saying to me is that WC sends the origin-server
> response directly back to the client, and independently sends it to
> squid (with the front-end ignoring the squid response).
>

Much clearer now, thank you.

-- 
Marcello Romani