千千阙歌 wrote: > squid-users，您好！ > > Redhat Linux AS 4: squid2.6.STABLE16 + apache 2.0.61 > > 1.I use apache to control cache time , > <IfModule mod_expires.c> > ExpiresActive on > ExpiresByType text/html A60 > ExpiresByType text/css A1296000 > ExpiresByType image/gif A1296000 > ExpiresByType image/jpeg A1296000 > EXpiresByType application/x-shockwave-flash A1296000 > EXpiresByType application/x-javascript A1296000 > ExpiresDefault A60 > </IfModule> > > then i found the squid can't cache , and the i change A60 to A61 , the squid work well! > > 2.If i use squid control the cache time，it also dosn't work! > refresh_pattern -i ^http://media.mydomain.com/ 1 100% 1 override-lastmod override-expire reload-into-ims (1 minute can't cache) > > refresh_pattern -i ^http://media.hexun.com/ 2 100% 2 override-lastmod override-expire reload-into-ims (when i set 2 minute , it works! ) > > i really don't known why! Hmm, I think Apache might be sending out Cache-Control: max-age=60 ?? That is not stripped by your override-* and will prevent squid saving objects past 60 seconds. NP: by default refresh_patterns only applies when there are no Expires: or Cache-Control, Last-Modified: headers. The override-* options effectively strip out some of those headers (permanently) before their presence is checked to see if refresh_pattern is needed. BUT, if some header details remain after stripping, the pattern may still be prevented from determining the expiry time. I hope this helps you understand refresh_pattern a little more. Amos
