Re: [squid-users] Accelerator: How to force PEER over DIRECT

Hello,

I was trying to use multicast when I first run into this problem... so i
moved to unicast to make solve the issue first... it turns our in
unicast the problem was simple the http port number in the cache-peer
param was wrong. SQUID was indeed trying to connect to the peers but
fails and only then does it connect to the origin server. I had to use
debug All,9 to see this mistake!

Now I switched back to multicast and the problem is indeed still there.
in the full debug mode I see the peer requets sent and then immidiately
the DIRECT path is used... later the UDP_HIT arrives, but too late!

icpHandleIcpV2: ICP_HIT from 192.168.1.223 for 'http://neo.your-sit...
neighborsUdpAck: opcode 2 '05035B177B8F5803075FB0466EB6C8AA'
storeGet: looking up 05035B177B8F5803075FB0466EB6C8AA
whichPeer: from 192.168.1.223 port 3130
neighborsUdpAck: '05035B177... already being fetched.

Is this a bug?

Thanks a lot.
Mohamed~

On Thu, 2006-03-30 at 14:17 -0500, Mohamed Lrhazi wrote:
> I am trying to configure a bunch of SQUIDs as httpd_accelerators and
> in my first tests I could never get a HIT from a sibling... though ICP
> quesries are sent and UDP_HITS are recieved, SQUID always prefers to
> fetch from the origine server! I would always get TCP TIMEOUT code ,
> untill I changes the minimum_direct_rtt to set it to zero. Now I
> always get TCP_MISS:DIRECT
>
> I enabled debuging of peer selection and it shows it clearly, please
> see the output bellow.
>
> First my config, then the debuging output:
>
> icp_hit_stale on
> icp_query_timeout 10000
> minimum_direct_rtt 0
> prefer_direct off
> dead_peer_timeout 3600 seconds
>
> http_port 80
> httpd_accel_host 192.168.1.72
> httpd_accel_port 80
> httpd_accel_single_host on
> httpd_accel_uses_host_header on
> httpd_accel_with_proxy on
>
> cache_peer 192.168.1.224 sibling 3128 3130 allow-miss no-netdb-exchange
> cache_peer 192.168.1.223 sibling 3128 3130 allow-miss no-netdb-exchange
> cache_peer 192.168.1.222 sibling 3128 3130 allow-miss no-netdb-exchange
> cache_peer 192.168.1.221 sibling 3128 3130 allow-miss no-netdb-exchange
> icp_port 3130
>
> debug_options 73,9 28,9 44,9
>
> Debug:
>
> 2006/03/30 11:00:23| peerSelect: http://neo.your-site.com/data.4
> 2006/03/30 11:00:23| peerSelectFoo: 'GET neo.your-site.com'
> 2006/03/30 11:00:23| peerCheckNetdbDirect: MY RTT =3D 0 msec
> 2006/03/30 11:00:23| peerCheckNetdbDirect: minimum_direct_rtt =3D 0 msec
> 2006/03/30 11:00:23| peerCheckNetdbDirect: MY hops =3D 0
> 2006/03/30 11:00:23| peerCheckNetdbDirect: minimum_direct_hops =3D 4
> 2006/03/30 11:00:23| peerSelectFoo: direct =3D DIRECT_MAYBE
> 2006/03/30 11:00:23| peerSelectIcpPing: http://neo.your-site.com/data.4
> 2006/03/30 11:00:23| peerSelectIcpPing: counted 3 neighbors
> 2006/03/30 11:00:23| peerSelect: Doing ICP pings
> 2006/03/30 11:00:23| peerSelect: 3 ICP replies expected, RTT 10000 msec
> 2006/03/30 11:00:23| peerHandleIcpReply: ICP_HIT http://neo.your-site.com/d=
> ata.4
> 2006/03/30 11:00:23| peerSelectFoo: 'GET neo.your-site.com'
> 2006/03/30 11:00:23| peerCheckNetdbDirect: MY RTT =3D 0 msec
> 2006/03/30 11:00:23| peerCheckNetdbDirect: minimum_direct_rtt =3D 0 msec
> 2006/03/30 11:00:23| peerCheckNetdbDirect: MY hops =3D 0
> 2006/03/30 11:00:23| peerCheckNetdbDirect: minimum_direct_hops =3D 4
> 2006/03/30 11:00:23| peerSelect: SIBLING_HIT/192.168.1.224
> 2006/03/30 11:00:23| peerAddFwdServer: adding 192.168.1.224 SIBLING_HIT
> 2006/03/30 11:00:23| peerGetSomeParent: GET neo.your-site.com
> 2006/03/30 11:00:23| peerAddFwdServer: adding DIRECT DIRECT
> 2006/03/30 11:00:23| peerSelectCallback: http://neo.your-site.com/data.4
>
> How can I get SQUID to use the peers if they have the object and only
> use origine if not?
>
> Thanks alot, this is driving me nutts, while Googling around I found
> my own post asking the acact same question right here on this list,
> almost two years ago!!!
>
> Mohamed~
Received on Thu Mar 30 2006 - 19:34:17 MST