Here is some more information on my previous question. The configuration, test requests and logs are listed below. Configuration on squid A (http port 7129): ------------------------------------ http_port 7129 accel defaultsite=vmdevcagpcna01.firstamdata.net acl ACLGPLSites dstdomain vmdevcagpcna01.firstamdata.net acl ACLSquidPeers src 192.168.54.65 http_access allow ACLGPLSites icp_access allow ACLSquidPeers #miss_access allow ACLSquidPeers # origin app server is vmdevcagpcna01 (192.168.54.64:7533) cache_peer vmdevcagpcna01.firstamdata.net parent 7533 0 no-query originserver name=OriginGPLServer cache_peer 192.168.54.65 sibling 7130 7230 name=GPLCache2 proxy-only cache_peer_access OriginGPLServer allow ACLGPLSites cache_peer_access GPLCache2 allow ACLGPLSites icp_port 7229 # allow purge method from localhost acl PURGE method purge acl localhost src 192.168.54.65 http_access allow purge localhost http_access deny purge ----------------------------------- Configuration on squid B (http port 7130): ------------------------------------ http_port 7130 accel defaultsite=vmdevcagpcna01.firstamdata.net acl ACLGPLSites dstdomain vmdevcagpcna01.firstamdata.net acl ACLSquidPeers src 192.168.54.65 http_access allow ACLGPLSites icp_access allow ACLSquidPeers #miss_access allow ACLSquidPeers # origin app server is vmdevcagpcna01 (192.168.54.64:7533) cache_peer vmdevcagpcna01.firstamdata.net parent 7533 0 no-query originserver name=OriginGPLServer cache_peer 192.168.54.65 sibling 7129 7229 name=GPLCache1 proxy-only cache_peer_access OriginGPLServer allow ACLGPLSites cache_peer_access GPLCache1 allow ACLGPLSites icp_port 7230 # allow purge method from localhost acl PURGE method purge acl localhost src 192.168.54.65 http_access allow purge localhost http_access deny purge ------------------------------------ The sequence of requests that I sent was: ------------------------------------ ./squidclient -h 192.168.54.65 -p 7129 -m HEAD -H "Cache-Control: only-if-cached\n" "http://vmdevcagpcna01.firstamdata.net/gis/v1.6.3/wms?REQUEST=GetMap&SER VICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRU E&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:property_ layer&QuadKey=0230132002300312230" ./squidclient -h 192.168.54.65 -p 7130 -m HEAD -H "Cache-Control: only-if-cached\n" "http://vmdevcagpcna01.firstamdata.net/gis/v1.6.3/wms?REQUEST=GetMap&SER VICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRU E&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:property_ layer&QuadKey=0230132002300312230" ./squidclient -h 192.168.54.65 -p 7130 "http://vmdevcagpcna01.firstamdata.net/gis/v1.6.3/wms?REQUEST=GetMap&SER VICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRU E&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:property_ layer&QuadKey=0230132002300312230" ------------------------------------ Access.log from Squid A: ------------------------------------ 1246040022.545 0 192.168.54.65 TCP_MEM_HIT/200 274 HEAD http://vmdevcagpcna01.firstamdata.net:7129/gis/v1.6.3/wms?REQUEST=GetMap &SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT =TRUE&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:prope rty_layer&QuadKey=0230132002300312230 - NONE/- application/vnd.ogc.se_xml 1246040041.305 0 192.168.54.65 UDP_MISS/000 274 ICP_QUERY http://vmdevcagpcna01.firstamdata.net:7130/gis/v1.6.3/wms?REQUEST=GetMap &SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT =TRUE&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:prope rty_layer&QuadKey=0230132002300312230 - NONE/- - ------------------------------------- Access.log from Squid B: ------------------------------------- 1246040028.217 0 192.168.54.65 TCP_MISS/504 290 HEAD http://vmdevcagpcna01.firstamdata.net:7130/gis/v1.6.3/wms?REQUEST=GetMap &SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT =TRUE&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:prope rty_layer&QuadKey=0230132002300312230 - NONE/- text/html 1246040041.391 86 192.168.54.65 TCP_MISS/200 5762 GET http://vmdevcagpcna01.firstamdata.net:7130/gis/v1.6.3/wms?REQUEST=GetMap &SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT =TRUE&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:prope rty_layer&QuadKey=0230132002300312230 - FIRST_UP_PARENT/OriginGPLServer image/png ------------------------------------- As you can see that, A has the object(TCP_MEM_HIT), while B does not(TCP_MISS). But when a request for the object is sent to B, A gets a UDP_MISS with a URL having squid B's port number 7130 in it. I don't understand why. Thanks! Roy -----Original Message----- From: Lu, Roy [mailto:rlu@xxxxxxxxxxxxxxx] Sent: Friday, June 26, 2009 10:28 AM To: squid-users@xxxxxxxxxxxxxxx Subject: Problem with siblings running on different http ports Dear list, I have two squid sibling caches in accelerator mode with different http ports (squid A port 3128 and squid B 3129). Both point to the same back end origin server. When i used the squidclient to test them, I made sure squid A has a requested object in cache(TCP_HIT), while squid B does not(TCP_MISS). Now when I send a request to B, I can see a message in A's access log with UDP_MISS status, but the ICP_QUERY url contains B's http port 3129. So the result is B goes to the backend sever to get the object, instead of from A. Why does the ICP_QUERY have the requesting silbling's http port? Thanks, Roy ************************************************************************ ****************** This message may contain confidential or proprietary information intended only for the use of the addressee(s) named above or may contain information that is legally privileged. If you are not the intended addressee, or the person responsible for delivering it to the intended addressee, you are hereby notified that reading, disseminating, distributing or copying this message is strictly prohibited. If you have received this message by mistake, please immediately notify us by replying to the message and delete the original message and any copies immediately thereafter. Thank you. ************************************************************************ ****************** FACLD
