Hi, I've got a reliable but slow backend that sends cacheble responses. When I run a manual test, I can see I miss the cache every one in a while and got hits most of the time. This is also reflected in the response time, 200+ ms for a miss, ~20ms for a hit.
However when I request the same resource multiple times at the same instant, I see multiple requests at the origin server. Ideally I would like to have only a single request to the origin server and queuing all other incoming requests in Squid. The 'collapsed_forwarding on' option seems to do exactly as I want, however when I turned this option and restarted Squid I still see multiple requests at the backend. I've tried to add a cache_dir as suggested in section 'Known issues and shortcomings' on http://wiki.squid-cache.org/Features/CollapsedForwarding but to no avail. I've placed the config directive on multiple locations in the configuration file, both before and after the http_port directive as well as the cache_dir directive. Again no results. Is the collapsed_forwarding directive the correct one to use for my use-case or am i missing something? I'm using the default configuration of version 3.5.19 with the following changes: #Queue incoming requests when a request is send to the backend. I.E. collapse request into a single backend request. collapsed_forwarding on # Squid normally listens to port 3128 http_port 3128 accel no-vhost defaultsite=localhost ignore-cc #Backend requires basic auth cache_peer 127.0.0.1 parent 53142 0 no-query originserver name=myAccel login=username:password #Allow caching of files that have a ttl of 1 seconds minimum_expiry_time 1 seconds acl our_sites dstdomain localhost http_access allow our_sites cache_peer_access myAccel allow our_sites cache_peer_access myAccel deny all See also: http://serverfault.com/questions/782877/on-multiple-request-to-squid-send-a-single-request-to-a-backend-and-queue-other
_______________________________________________ squid-users mailing list squid-users@lists.squid-cache.org http://lists.squid-cache.org/listinfo/squid-users
