Re: Cache behavior in the absence of a Fresh-until: header

> >Is this what HTTP/1.0 caches do: keep things for 7 days?  Or does
> >the practice vary?  Any experts out there?
> 
> I believe the practice varies.  The CERN cache seems to have the
> directive CacheRefreshInterval to specify such an upper bound.  The
> documenattion file gives
> 
>  CacheRefreshInterval  *                            1 week

Both CERN and Netscape Proxies use two parameters; one is the
above-mentioned CacheRefreshInterval (max-uncheck in ns-proxy), and
CacheLMFactor (lm-factor) which is used to estimate the expiration
time by using Last-Modified header.

Harvest Cache Daemon and others that I know of use only the
CacheRefreshInterval; they lack the lm-factor which is very useful in
catching documents for which the default max-uncheck would be too
high.

Cheers,
--
Ari Luotonen				ari@netscape.com
Netscape Communications Corp.		http://home.netscape.com/people/ari/
501 East Middlefield Road
Mountain View, CA 94043, USA		Netscape Server Development Team

Received on Wednesday, 10 January 1996 14:02:52 UTC