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Re: acl and cache

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ons 2006-05-03 klockan 12:42 +0200 skrev Aurélien Bras:

> TCP_REFRESH_ mean my object is STALE and Squid need to verify on
> public serveur. HIT mean the object is still good and MISS it isn't.
> So, with a miss i need to dowload the file.

Well, not really. A /304 is a "Not modified" message where only headers
exchanged verifying that the object hasn't changes, no file content.

> With no_cache deny BACK :
> TCP_REFRESH_HIT/200 1544 GET <url>.gif - FIRST_UP_PARENT/127.0.0.1 text/html
> TCP_MISS/304 232 GET <url>.gif - DIRECT/216.239.59.103 text/html

Which is OK, except that the information was stale which is unrelated to
no_cache.

> Without no_cache deny BACK :
> 
> TCP_REFRESH_HIT/200 1544 GET <url>.gif - FIRST_UP_PARENT/127.0.0.1 text/html
> TCP_REFRESH_HIT/304 232 GET <url>.gif - DIRECT/216.239.59.103 text/html

The only difference here is that the parent had the object cached. In
both it was stale.

Again:

> > If in doubt send access.log details with log_mime_hrds on from both
> > squids.

Regards
Henrik

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