[48222] in North American Network Operators' Group
Re: Routers vs. PC's for routing - was list problems?
daemon@ATHENA.MIT.EDU (David Charlap)
Sat May 25 00:24:51 2002
Message-ID: <3CED637C.5AD925B6@marconi.com>
Date: Thu, 23 May 2002 17:47:40 -0400
From: David Charlap <David.Charlap@marconi.com>
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Vinny Abello wrote:
>>
>> First off, you're right about moving parts generally being a bad
>> thing. However, it is not always necessary to eliminate the hard
>> drive. Two drives in a RAID-0 configuration may be reliable
>> enough. Especially if the failure of a single drive sets off
>> sufficient alarms so that it can quickly be hot-swapped for a new
>> drive.
>
> I'm assuming you meant RAID-1. In RAID-0 if you 'swapped' any drive
> all your striped data is toast. ;)
Oops. Yes. of course I meant RAID-1.
>> Then there's the issue of the PCI bus. Standard PCI (32-bit 33MHz)
>> has a theoretical maximum bandwidth of about 1Gbit/s. But you can
>> never use all of a PCI bus's bandwidth, so actual limits will be
>> less than this.
>
> True... unless going for 64 bit PCI at 66MHz...
64/66 PCI has 4 times as much bandwidth - about 4Gbit/s. Much better
than standard PCI, but hard to find on a PC-compatible motherboard, and
expensive when you do find it. Enough bandwidth for 10 line-rate 100M
Ethernet ports or six line-rate OC-3 ports (in theory, anyway). But not
really enough for anything faster (OC-12 or GigE) if you want line-rate
forwarding.
-- David
