Re: cache not cacheing

On Aug 18, 10:50am, David J N Begley wrote:
> Subject: Re: cache not cacheing
> On Mon, 18 Aug 1997, Daniel Harrison wrote:
>
> > I have a cache server that I can't get to cache.
> [...]
> > I upgraded squid to the latest stable version (1.1.14) and no change.
>
> I know this may seem like a silly question at first, but it has to be
> asked anyway; have you "migrated" the Squid configuration file carefully
> to suit any changes in each new version? What "refresh_pattern" rules are
> you using?

The first version I installed was 1.1.1 (came with a Debian Linux 1.3
distribution). So migration did not involve much reconfiguration.

Here is the refresh pattern:
        refresh_pattern . 0 100% 10080

The machine is behind a packet filter so it also has
        inside_firewall usyd.edu.au strathfield.nsw.edu.au
        local_domain usyd.edu.au strathfield.nsw.edu.au
        hierarchy_stoplist
To force it to use the following parents.
        cache_host www-cache.usyd.edu.au parent 8080 3130 weight=5
        cache_host www-cache2.usyd.edu.au parent 8080 3130 weight=1

The failure to cache occurrs both direct and via the parent caches.

> Have you produced any stats from the access logs to confirm that the proxy
> is doing more proxying and less caching?

It is only a recently installed machine so the log files are very small.

On furthur study of store.log I have found that some sites _do_ log valid
datehdr and/or lastmod fields.
For example:
        http://www.altavista.yellowpages.com.au/
  no datehdr or lastmod
         http://www.altavista.yellowpages.com.au/av/pix/telstra/msite2.gif
  both datehdr & lastmod

I believe I am having two problems.
- The first GET is not obtaining LM Last Modified) information for the page
(not all cases).
- On subsequent retrievals, the IMSGet (Is Modified Since) is failing to
establish that the page has not been changed.

-Daniel

-- 
Daniel Harrison				Ph. (02) 9351 5519
Network Administrator			D.Harrison@isu.usyd.edu.au.
Sydney University			Bld H08, Sydney
Confidence is the feeling you have before you understand the situation.