Re: [squid-users] Slow switching to parent proxy

Mr Crack wrote:
> I am using squid 2.6 STABLE-6 with RedHat Linux Enterprise 5.x
> My ISP has 5 proxy servers.
> But sometimes they down often
> If the first proxy is down, I want squid to switch to second proxy etc ....
> I have configure squid as below
>
> ============== squid.conf ========================
> cache_peer 202.1.1.4 parent 8080 3130 no-query no-digest
> cache_peer 202.1.1.5 parent 8080 3130 no-query no-digest
> cache_peer 202.1.1.6 parent 8080 3130 no-query no-digest
> cache_peer 202.1.1.7 parent 8080 3130 no-query no-digest
>
> peer_connect_timeout 3 seconds
> ================= end of squid.conf ================
>
> If first proxy down, it really try to detect next proxy server.
> BUT IT TRY FOR ABOUT TEN TIMES. Please see cache.log for details
> BUT I WANT TO TRY ABOUT 4 TIMES as maximum
> HOW CAN I DO THAT.
> Because of I have setup cache_peer_timeout=3 seconds, it takes
> 30-seconds to try for a proxy.
> If first 4 proxy down and the last server is active, it takes 2-minutes.
> But my Internet Cafe users cannot wait up to 2-3 minutes and they go out.
> Note: If i set peer_connect_timeout less than 3 seconds, it does not work well
>

Check your maximum_single_addr_tries is still at its default '1'.
That seems to be the closest squid has so far to a connect-retry counter.

Amos

> Any Suggestion are welcomed.
>
> Mr. Crack 007
> ===================================== Here is squid cache.log after
> squid restart =============================
> 2008/01/24 04:54:41| WARNING: Very large maximum_object_size_in_memory
> settings can have negative impact on performance
> 2008/01/24 04:54:41| Initialising SSL.
> 2008/01/24 04:54:41| User-Agent logging is disabled.
> 2008/01/24 04:54:41| Referer logging is disabled.
> 2008/01/24 04:54:41| DNS Socket created at 0.0.0.0, port 32773, FD 8
> 2008/01/24 04:54:41| Adding domain orbitnet.com.mm from /etc/resolv.conf
> 2008/01/24 04:54:41| Adding nameserver 202.1.1.1 from /etc/resolv.conf
> 2008/01/24 04:54:41| Adding nameserver 202.1.1.2 from /etc/resolv.conf
> 2008/01/24 04:54:41| Accepting proxy HTTP connections at 0.0.0.0, port
> 8080, FD 9.
> 2008/01/24 04:54:41| Accepting ICP messages at 0.0.0.0, port 3130, FD 12.
> 2008/01/24 04:54:41| WCCP Disabled.
>
>>>>>>> Here is my proxy list after restarting squid
>
> 2008/01/24 04:54:41| Configuring Parent 202.1.1.4/8080/3130
> 2008/01/24 04:54:41| Configuring Parent 202.1.1.5/8080/3130
> 2008/01/24 04:54:41| Configuring Parent 202.1.1.6/8080/3130
> 2008/01/24 04:54:41| Configuring Parent 202.1.1.7/8080/3130
> 2008/01/24 04:54:41| Configuring Parent 202.1.1.8/8080/3130
> 2008/01/24 04:54:41| Loaded Icons.
> 2008/01/24 04:54:41| Ready to serve requests.
> 2008/01/24 04:54:41| disabling (peer disappeared) digest from 203.81.71.88
> 2008/01/24 04:54:47| Reconfiguring Squid Cache (version 2.6.STABLE6)...
> 2008/01/24 04:54:47| FD 9 Closing HTTP connection
> 2008/01/24 04:54:47| FD 12 Closing ICP connection
> 2008/01/24 04:54:47| Cache dir '/var/spool/squid' size remains
> unchanged at 20480000 KB
>
>>>>> Here is the problem I suffers
>
> 2008/01/24 02:58:15| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:15| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:17| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:18| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:18| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:20| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:21| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:22| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:22| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 02:58:26| TCP connection to 202.1.1.4/8080 failed
> 2008/01/24 01:58:30| Detected DEAD Parent: 202.1.1.4
>
> 2008/01/24 02:58:41| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:58:43| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:58:43| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:58:44| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:58:49| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:58:54| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:58:56| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:59:23| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:59:32| TCP connection to 202.1.1.5/8080 failed
> 2008/01/24 02:59:54| parseHttpRequest: Unsupported method ' CONNECT'
> 2008/01/24 02:59:56| Detected DEAD Parent: 202.1.1.5
>
> 2008/01/24 02:59:57| TCP connection to 202.1.1.6/8080 failed
> 2008/01/24 02:59:59| TCP connection to 202.1.1.6/8080 failed
> ===================================== End of squid cache.log
> =============================

-- 
Please use Squid 2.6STABLE17+ or 3.0STABLE1+
There are serious security advisories out on all earlier releases.