Re: [squid-users] Do not make conditional requests to the originserver when cache hits. Is it possible?

Kai-Chieh Ku wrote:
> Hello,
>
> I just setup a reverse proxy. But I noticed squid always send
> conditional requests to the backend server even its local cache
> contains the fresh data. The response headers looks like this:
> --
> HTTP/1.0 200 OK
> Last-Modified: Wed, 17 03 2010 08:26:15 GMT
> Cache-Control: max-age=86400
> Content-Type: text/plain
> X-Cache: MISS from ku-office
> X-Cache-Lookup: HIT from ku-office:81
> Via: 1.0 ku-office:81 (squid/2.7.STABLE8)
> Connection: close
> --
> The backend server listened on port 80 and squid listened on port 81.
>
> And my settings of squid are:
> --
> http_port 81 vport=80 defaultsite=localhost
> cache_peer 127.0.0.1 parent 80 0 no-query no-digest originserver
> refresh_pattern . 0 20% 4320
> --
>
> I'd like to let squid make the conditional request only when the cache
> entry is expired. What am I missing?

... very twisted.

You have squid listening on pot 81 for requests to
http://localhost:80/something

Take a read through this:
http://wiki.squid-cache.org/ConfigExamples/Reverse/BasicAccelerator

As for the backend queries, you show no evidence that they are happening
at all. The reply you show has bee updated with current origin info.
there is no sign of what it was when squid received the client request.
check access.log for TCP_HIT (exactly), these are true cache hits. The
others all needed to be updated due to data aging out.

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE8 or 3.0.STABLE25
   Current Beta Squid 3.1.0.18