On Sun, 2009-08-09 at 14:19 +1200, Amos Jeffries wrote: > Muhammad Sharfuddin wrote: > > Squid Cache: Version 2.5.STABLE12 > > and > > Squid Cache: Version 2.7.STABLE5 > > > > I am using following refresh_patterns and never encounter any problem. > > e.g once I visit a website, on next visit usually squid serves it from > > cache, and TCP_HIT or TCP_MEM_HIT or TCP_REFRESH_HIT etc are so common > > in '/var/log/squid/access' > > > > But a person(who I beleive is a Linux/Squid Guru) critcize on the > > refresh_pattern I am using in squid. > > (One of my posts or someone else?). > > > > > So please pass your comments and corrections on the following configs > > > > #Suggested default: > > refresh_pattern ^ftp: 1440 20% 10080 > > refresh_pattern ^gopher: 1440 0% 1440 > > ####refresh_pattern . 0 20% 4320 > > > > refresh_pattern -i \.ico$ 43200 100% 43200 override-lastmod > > override-expire ignore-reload > > The problem with these commonly used patterns is that websites are now > obfuscating the URL with query strings more and more often. Not always > intentionally. > > Example; the above pattern will not match any website with: > http://example.com/some.ico?sid=user-session-id&track=fukn-cookie-id > > changing the hard $ to softer (\?.*)?$ catches all of those websites > and keeps Squid doing what you meant to configure. > > > Other than that the only thing to draw real criticism is the use of > non-compliant override options. It's not nice netizen behaviour, ... but > ... "everyone else does it". > > > [warning rant ahead: (not your fault I know)] > > Personally as a webmaster I set realistic expiry info on every website I > touch in order to maximize speed and cacheability, particularly since > getting to now Squid. It really annoys me that admin like yourself are > forced to do this by a horribly large amount of clueless websites and > CMS software developers. > Such rules will in fact _decrease_ the cacheability times and benefits > for many of the websites I and other clued-on people setup. We are > forced to cope by changing filenames and sometimes URL links on every > single edit, no matter how trivial. > I'm sick of people complaining "why can Y see their user icon in forum X > but I can't? ... what?! cant fix it till next month just because I live > in country/ISP X?" always the webmaster to blame, never the browser > author or transparent proxy admin. > /rant > > Amos So in other words its not a healthy practice to use 'refresh_patterns' other then the defaults(in squid.conf 'Suggested default') ?. Regards --ms
