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Date:      Sun, 4 Jan 1998 14:11:46 +0100
From:      Lukas Wunner <lukas@design.de>
To:        =?iso-8859-1?Q?=22Luis_E=2E_Mu=F1oz=22?= <lem@cantv.net>
Cc:        freebsd-isp@FreeBSD.ORG
Subject:   Re: [fbsd-isp] Designing for a very large ISP
Message-ID:  <19980104141146.32430@reactor>
In-Reply-To: =?iso-8859-1?Q?=3C3=2E0=2E5=2E32=2E19980103121611=2E007af8f0=40pop=2Ecan?= =?iso-8859-1?Q?tv=2Enet=3E=3B_from_=22Luis_E=2E_Mu=F1oz=22_on_Sat=2C_Jan?= =?iso-8859-1?Q?_03=2C_1998_at_12=3A16=3A11PM_-0400?=
References:  <3.0.5.32.19980103121611.007af8f0@pop.cantv.net>

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Hi,

> During the first year, it'll have to support some 100000 users.
> Of course, we've already chosen FreeBSD as the core OS for this
> after looking to Digital Unix, Solaris and Windows NT.

My suggestion would be to look at an SGI Origin 200/2000 or Sun U2 box
instead of a PC box running FreeBSD. We have experienced severe problems
with PCs wrt expandability/scalability. E.g., we currently have 256MB of
RAM in our news box but would love to go to 512MB, but the motherboard
is not capable of doing that although the documentation and the webpages
state the contrary (it's a Tyan Tomcat III or IV). If you want to go to
something like 1GB or 2GB of RAM, you're stuck with a PC. The only
solution seem to be PPro based machines, but the chipsets available so
far are really ugly wrt memory and PCI performance in my opinion (as
compared to good old Pentium based boards). The only chipset which seems
to be able to support lots of RAM and more than 4 PCI cards seems to be
the Orion GX, one implementation being the AMI Goliath board (cf. www.ami.com).
However, I have not been able so far to get my hands on one of these
boards *without* buying a large expensive box from Compaq et al (it seems
AMI only sells these boards to OEMs, at least I have not found a
distributor here in Germany, if you know of one, please drop me a line).
The Goliath board also requires special (read: expensive) DIMMs, you
can not use standard PS/2s or SDRAMs.

Experience also has shown that usually you have to invest more time
into getting a PC based server running as compared to a machine which
was designed from scratch to be a high performance/bandwidth server
like the SGI Origin 2000, and time is money (I have spent *several* hours
trying to get the Tomcat board running with more than 256MB of RAM).

Note: this is no FreeBSD-bashing. I'd always prefer a FreeBSD-based
machine to an SGI Origin 2000 if it wasn't that difficult to find
PC hardware which suits our needs wrt scalability/performance.
Any recommendations for high-end PC hardware are welcome.

Thanks,
	Lukas.

-- 
lukas wunner         unix, internetworking and security engineer
lukas@wunner.de      LW26-RIPE      http://www.wunner.de/~lukas/
Funkmodems mit 2.4GHz FAQ      http://www.wunner.de/~lukas/funk/



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