RE: [squid-users] SQUID and WCCP V1 in an ISP setup

Joe,

I don't understand why cache peering is counter-productive here. If a cache
member has the object, why not share it among other cache members?

-----Original Message-----
From: Joe Cooper [mailto:joe@swelltech.com]
Sent: Thursday, December 06, 2001 10:18 PM
To: SysAdmin
Cc: squid-users@squid-cache.org
Subject: Re: [squid-users] SQUID and WCCP V1 in an ISP setup

SysAdmin wrote:

> I am working in an ISP environment where there are four links to the
> internet world. All are not of same capacity. I am running BGP to send
> traffic through various links. Now, for the past couple of months I am
> struggling to setup a transparent proxy in my network. Some how I am
> ending up with troubles n customer pressure. I nearly have 4 and half
> megs to serve and at any point of time my customers online (no of pcs is
> touching aroung 700 to 800 ps).
>
>
>
> I have cacheRAQ4 with me with 20GB HDD 512RAM + DS10 with 512RAM n 18GB
> HDD (On Digital Unix) + Intel P-III, PC 512RAM 8GBHDD. All the three
> are running squid and I would like to make a optimal sharing among the
> cache servers.

WCCP will evenly divide traffic amongst your servers automatically,
though your really don't need three servers to provide 4.5 Mbits of
throughput. One (assuming you give one of your boxes a second HD) will
do it just fine, or two for redundancy.

> can any one suggest how do I go about? Is the port redirection mechanism
> necessary if the cache listens on port 80? Is the sibling relation among
> cache servers increases the performance? How do I tackle the latency
> issue...

Your Squid can listen on any port--but you need to redirect port 80
traffic to the cache port (whether Squid is listening on port 80, or its
default of 3128 or anything else). Use ipchains or iptables for this task.

Cache peering is counter-productive in your environment. WCCP will
divide traffic in such a way that data sharing is not required--it
splits traffic based on destination IP of the client requests so every
cache will contain unique data.

-- 
Joe Cooper <joe@swelltech.com>
http://www.swelltech.com
Web Caching Appliances and Support