Re: [LARTC] htb: HowTo identify squid cache hits

[Evgeni Gechev <etg@setcom.bg>]

Peter Kaagman wrote:

>Hi list...
>
>I work for a school in the netherlands with a 2mbit Internet uplink and
>about 3800 eager student who want to play games on the Internet using
>one of our 800 workstations.
>
>Problem was that those game playing students are concentrated in 2 of
>our 6 physical locations... and they consumed the bandwidth which the
>other location would like to use for educational purposes.
>
>The thing we did first was use squid... with success. The hit ratio on
>data transfer is 25-30%... "free" bandwidth.
>
>Today I took the plunge and started to use HTB traffic shaping... and
>(to my surprise) I got it going without much troubles.
>
>The setup I have chosen first divides the load over two classes:
>- one for Internet rate 2mbit and a 2mbit ceil
>- a second for our DMZ rate 98mbit and a 100mbit ceil
>
>Next I sub-classed the Internet bucket into 6 classes each with a
>333kbit rate and a 2mbit ceil.
>
>This has had the effect that my DMZ can be accessed at full speed while
>they fairly share the Internet uplink.
>
>And the way it looks now it works :D
>Hail to all those people who wrote those fine docs _o_
>
>This is enough reason to address this list... just to say "Thank you!",
>but there is more.
>
>At the moment I do not max out my Internet link... reason for this is I
>guess the squid proxy...
>The way it works now is that I have 2 types of filters in effect:
>- The DMZ: all packages with a src ip from my DMZ go to the big 98/100
>  bucket.
>- The Internet: all packages with a dst ip in one of our 6 networks
>  gets placed in one of the 6 333/2000 buckets.
>
>But there is of course a src of packages I do not catch this way... and
>these are the squid cache hits. Because I filter on destination the cache
>hits get treated the same as cache misses. But cache hits are in effect
>local traffic... they do not originate from the Internet.
>
>So here (finally) the question..
>Is there a way to identify cache hits from misses?
>
>I took a look at the advanced filtering chapter of course, but am
>really dazzled by that (and I thought I understood TCP/IP a bit ;)).
>
>Some further info that would perhaps help is that squid is run as a
>transparant proxy on the router/firewall.
>
>regards
>
>Peter Kaagman
>  
>
http://www.it-academy.bg/zph/
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