Re: [squid-users] squid performance

You're never going to get 100 Mbps.

For starters, the theoretical maximum of Ethernet is about 37% of raw wire
speed. So even under most ideal conditions, you are never getting above
37Mbps on a 100 Mbps line.

Next, some of that bandwidth that is not being measured but neccessary, are
the hosts talking back and forth with each other... outside of the actual
data being transfered.

Finally, if you are plugged into a hub, you have to divided the amount of
available bandwidth by the number of active hosts (hubs are shared
bandwidth, sqitches aren't).

If you have a 100 Mbps line, with three hosts talking on it at the same
time, you are looking at:

100 x .37 / 3 = 11Mbps.

Then you have to figure chatter between the hosts to keep a TCP session
going... makes you realize the bandwidth still is not that amazing. :)

Of course I don't have a degree in electrical engineering and the books I
have read could be all bunk, but this is how I understand things work.

Adam Lang
Systems Engineer
Rutgers Casualty Insurance Company
http://www.rutgersinsurance.com
----- Original Message -----
From: "Subbarao Gaddamadugu" <sgaddama@cs.uml.edu>
To: <sgaddamadugu@hotmail.com>
Cc: "Squid-Users" <squid-users@squid-cache.org>
Sent: Thursday, June 07, 2001 3:42 PM
Subject: [squid-users] squid performance

> i'm doing a test on squid performance.
> the client, squid and web server are connected over 100 Mbps line.
> why can't i get more than 3.5 Mbps throughput
>
> how should i tune squid to use available bandwidth.
>
> subba
Received on Thu Jun 07 2001 - 13:52:20 MDT