Re: how does squid work?

From: Marc van Selm <>
Date: Thu, 29 Apr 1999 09:13:11 +0200

At 01:28 PM 4/29/99 +1000, Tim Burgess wrote:
>Dear Everyone,
>How does squid behave when it has an object in its cache which has no expiry
>information? It obviously doesn't just automatically assume it is expired,
>and do an IMS request every time (since we still have normal TCP_HIT entries
>in our access.log for non-expiry info objects) because then every entry in
>the log would be TCP_REFRESH_* and never a TCP_HIT - not many sites provide
>expiry info. Is there a preset TTL for objects with no info?

The refresh rules (see squid.conf) help to calculate the time a file is
"fresh". The refresh rules specify a minimal time, a percentage of the file age
(calculated from th e last modified date) and a maximum age. Using the refresh
rules you can configure these parameters per filetype, url etc.


Marc van Selm
NATO C3 Agency
Communication Systems Division, A-Branch
Tel: +31 70 3142454
Received on Thu Apr 29 1999 - 01:20:08 MDT

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