Hi all,
I handle small network and we have 40 systems ( most having Ubuntu 14.04 and couple of system have windows ). We use squid to cache. Due to the country where i live there is huge data charges so i am using squid to cache things like Ubuntu updates and certain applications.
Issue i have is, My squid configuration is either failing to cache Ubuntu updates mostly Debian packages. I see following status codes frequently in my squid log file.
TCP_REFRESH_UNMODIFIED/304
TCP_REFRESH_UNMODIFIED/200
TCP_REFRESH_MODIFIED/200
which confuses me. as i know only few options like TCP_HIT/TCP_MEM_HIT/TCP_MISS. and searching about them explains that i might have my squid_patterns wrong or data might be changing but the problem is i have setup schedule so two system update on tuesday and then on wednesday all system updates. yet i see lots of data with status TCP_REFRESH_UNMODIFIED/200 or TCP_REFRESH_UNMODIFIED/304. Most clients get about 40% to 50% cache. I could totally understand the updates are there but i get stumped when TCP_REFRESH_UNMODIFIED/200 happens.
I also noticed TCP_REFRESH_UNMODIFIED/200 happens for google chrome debian package reguarly even though same file is downloaded previous day by some clients. i see entries of TCP_REFRESH_UNMODIFIED/200 or TCP_MISS/200 or TCP_REFRESH_MODIFIED/200. i have the entry in my configuration file for deb.google url like "refresh_pattern dl.google.com/.*\.(deb) 129600 100% 129600 reload-into-ims ignore-reload override-expire override-lastmod ignore-no-store ignore-private ignore-must-revalidate ".
Can any one help me with this issue? is this normal? Or there is an issue in my squid config? I have attached my squid config and some sample log which confuses me.
My squid version is : 3.3.8 for detail options and squid config file i have pasted the content of both at, ( Operating system is Ubuntu 14.04.3 LTS "trusty" )
My squid access.log file sample is available at,
Thanks.
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