RE: [squid-users] Caching in accelerator mode

Hi all,

To summarize.

My redirector script was set to redirect all requests (regardless of URL) to
http://myserver.domain.com.

When I turned on cache debugging, I found that requests to
http://sitea.domain.com or http://siteb.domain.com, were being cached as
http://myserver.domain.com (i.e. the accelerated host). Thus the cache was
not differentiating between the two requested URLs.
The solution was to create DNS aliases for http://myserver.domain.com, and
redirect to those. e.g.

http://sitea.domain.com redirect to http://myservera.domain.com
http://siteb.domain.com redirect to http://myserverb.domain.com
etc, etc

This causes the separate URL trees to be cached separately.

Thanks

Jez

-----Original Message-----
From: Jez Ahl [mailto:Jez@andelconsulting.com]
Sent: 22 May 2001 17:01
To: Squid Users (E-mail)
Subject: [squid-users] Caching in accelerator mode

Hi All,

Apologies if this has been covered, but I can find no explanation.

We are running multiple instances of squid-2.3STABLE2 on Solaris 7 in
reverse proxy mode.
All requests hit a master, non-caching squid. Requests are then redirected
(based on URL) to further squids (on localhost) by way of a redirector
script.
This allows us to proxy many sites through one box, each with their own
separate cache.
In this case, one of the sub-caches redirects to two different sites by way
of another redirector. e.g. to http://www.sitea.com/ and
http://www.siteb.com

What we are finding is that a page request to one site. eg
http://www.sitea.com/somepage.htm gets cached, but when someone requests
http://www.siteb.com/somepage.htm, they get the cached page that was served
from sitea. It's as if squid is not caring what the requested hostname is.

Our config is:

redirect_program /opt/squid/bin/rewriter
redirect_rewrites_host_header off
visible_hostname www.sitea.com
httpd_accel_host localhost
httpd_accel_port 8002 (This is the port of this squid)
httpd_accel_uses_host_header on

Any ideas how I can stop this happening?

Any help will be appreciated.

Jez Ahl
Senior Systems Administrator
Andel Consulting Ltd
Tel 020 7663 5772
Fax 020 7665 5060
jez@andelconsulting.com

Unless otherwise stated the views expressed in this email are personal and
not those of Andel Consulting.
Received on Wed May 23 2001 - 05:50:20 MDT