Re: [squid-users] Squid Hardware requirements.

On 14/06/2013 10:15 p.m., Stephan Viljoen wrote:
> Hi There,
>
> I need to build a proxy server for an ISP handling about 4000 ip addresses
> over a 125Mbps of Internet bandwidth and were wondering what the specs for
> such a server would be? It's going to be a transparent squid server
> configured with Tproxy running as a bridge.
> I'm thinking of using around 16GB of RAM

More RAM the better. Squid will run with only a few dozen MB, but the
more you can throw at it the more memory cache it can be assigned and
that is the fastest response traffic.
Also you *will* be aportioning the RAM between multiple Squid on this box.

> , two Quad core Xeon CPU's and
> about 8 SAS disks. Will this be enough or should I aim higher?

Squid uses one CPU per process and uses that CPU right to the bare metal
speed limits sometimes. So fast GHz ratings CPUs are better than more
slower cores.

> Some advice would be greatly appreciated.

With a box like that go straight to 3.3 series and experiment with SMP
workers to utilize more than one CPU core.

Each Squid instance / worker should be able to service a least 50 Mbps
per core. That does depend a lot on the request/sec rate of HTTP
messages that 50Mbps is built from. The Squid processing limit is only
reliably measure in requests per second. In HTTP/1.0 traffic that has
typically topped out at ~500req/sec around 100Mbps, but HTTP/1.1 is a
fair bit more optimized and revalidation traffic can top out at a higher
req/sec on just a few Mbps.
  Still an 8-core box has room to scale Squid out by bumping up the
worker count.

Amos
Received on Fri Jun 14 2013 - 11:38:22 MDT