RE: [squid-users] collapsed_forwarding not working as expected

Hey Amos,

Here are the details you asked for. I hope you see something in it that I don't.


Steve.



-----Original Message-----
From: Amos Jeffries [mailto:squid3_at_treenet.co.nz]
Sent: Wednesday, November 16, 2011 4:07 PM
To: squid-users_at_squid-cache.org
Subject: Re: [squid-users] collapsed_forwarding not working as expected


 On Wed, 16 Nov 2011 13:49:23 -0500, Schwenker, Stephen wrote:
> Hello,
>
> We've installed squid as an accelerator for our website, and it's
> working pretty well, but we have found out that the collapsed
> forwarding
> is not working as expected. We ran some load tests to a single url
> with
> a 1 minute expiry and squid is still sending approximately 12000
> request
> to the back end server in a 5 minute span. If I understand the
> documentation correctly, squid should only send 5 requests to the
> back
> end server.

 Object variance can affect that. 5 requests is the best-case scenario
 for a single static object representation.

 What are the reply headers coming back with the object?


Here are the response coming back that I've captured from fiddler using my browser.

HTTP/1.1 200 OK
Cache-Control: public
Content-Type: text/html; charset=utf-8
Expires: Thu, 17 Nov 2011 02:41:53 GMT
Last-Modified: Thu, 17 Nov 2011 02:41:08 GMT
Vary: Accept-Encoding
Server: Microsoft-IIS/7.0
X-AspNetMvc-Version: 3.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
WS: 2-3
Date: Thu, 17 Nov 2011 02:41:08 GMT
Content-Length: 21

11/16/2011 9:41:08 PM




>
> I've configured the following.
>
> http_port 80 accel defaultsite=<site name> vhost
> cache_peer <web server> parent 80 7 no-query no-digest originserver
> sourcehash monitorurl=/statuscheck/ name=<web server> http11
>
> ... acls
> ... header access

 Your "header access" re-writing may also affect the responses. What are
 these lines?


Here is the section with the header_access rules

minimum_expiry_time 30 seconds
cache_vary on
header_access X-Powered-By deny all
header_access X-AspNetMvc-Version deny all
header_access X-AspNet-Version deny all
header_access Server deny all
via off




 Amos

Received on Thu Nov 17 2011 - 02:52:36 MST