Re: [squid-users] expires time problem between apache and squid

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
Received on Tue Nov 27 2007 - 04:27:40 MST