Re: Squid benefit (bandwidth savings)

Our squids are giving between a 40% adn 25% bandwidth saving over the WAN
connections when we use cacheing. During peak hours, it appears that the
bandwidth savings is highest, although that is difficult to measure. ONe
point which has become clear in our studies is that one needs to have a
large enough cache to cache a significant portion of your traffic. We
are doing about 20 gigabytes of traffic a week and have a cache of about
4 gigabytes. realisitically we need to increase this cache size to
closer to 10 gigabytes (20 would be even better).

One point we have discovered. If.you squid crashes with a large cache,
it appear to be preferable to blow away the cache and start over rather
than to try to rebuild the cache.

Cheers!

Brad Groshok wrote:

> Hi all:
>
> I've been running squid for almost a year now, and am just not sure
> how much its helping in the saving bandwidth to our upstream.
>
> Currently running 2.3stable2 on FreeBSD, Intel PIII-600MHz, 768Meg,
> 2 x 9.1Gig, & 1 4.2Gig (SCSI) drives for cache.
> Caching for 700-800 Dial ports.
>
> Looking at MRTG stats for traffic to/from our squid box...
> The traffic coming in to the squid box is almost the same as the
> traffic going out of the box (to our clients)
>
> Rather than attach a image from our MRTG, I'll include a link to
> a sample 5 min graph from MRTG here.
> http://www.odyssey.on.ca/squid.gif
>
> Not sure if I'm expecting too much from squid, but I would have
> expected there to be a greater diff in incoming vs outgoing
> traffic.
> Is it possible I just don't have enough HD storage for cache dirs?
>
> _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
> _/ Regards: Brad Groshok (bgroshok@odyssey.on.ca) _/
> _/ President Odyssey Network Inc. http://www.odyssey.on.ca _/
> _/ London Ontario Canada PH:(519)660-8883 Fax:(519)660-6111 _/
> _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/

--
Regards.
Don Rolph w-rolph@ds.mc.ti.com WD3 MS10-13 (508)-236-1263