On 6/11/11 6:51 PM, RB wrote:
> On Sat, Jun 11, 2011 at 08:27, Lars Noodén <[email protected]> wrote:
>> Would that mean that a pair of machines transferring at full speed on
>> eth0 and eth1 would not reduce the available bandwidth for another pair
>> on eth2 and eth3? If not, then how can that be achieved.
>
> As has been noted a couple of times before on this list (indeed, on
> threads you've started), software switching is slow and you're not
> going to get anywhere near the performance of a hardware switch,
> especially with embedded hardware. Your bandwidth is limited by your
> processor and memory, not your port speeds.
Thanks. It would be nice to have a writeup of something like that, with
how and why, in the Wiki:
http://wiki.soekris.info/
> That is: it doesn't matter if you have 4 GbE interfaces if your
> processor/memory/kernel can only achieve, say, 1Gb/s. If two ports
> start consuming 800-900Mb/s, there's only 1-200Mb/s left for other
> ports, and there's little you can do to prevent that without taking
> bandwidth away from the initial two.
How would that be best measured?
/Lars
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