[CentOS] 10 GBASE-T
pasik at iki.fi
Thu Jan 14 08:30:23 UTC 2010
On Thu, Jan 14, 2010 at 10:08:55AM +0200, Pasi Kärkkäinen wrote:
> On Wed, Jan 13, 2010 at 02:31:09PM -0800, nate wrote:
> > 10GbE is really cheap these days(cheaper than 1GbE in some cases
> > on a per Gb basis) if you need faster performance, and simple
> > to configure, I wrote a blog on this a couple of months ago:
> > http://www.techopsguys.com/2009/11/17/affordable-10gbe-has-arrived/
> This reminded me of something. I remember reading some website
> (possibly Cisco's) earlier, and they mentioned 10 GBASE-T had
> much higher latency than other 10 Gbit options.
> Have you paid attention to this? How big is the difference nowadays?
> Or I wonder if it was just on some specific product..
> http://en.wikipedia.org/wiki/10_Gigabit_Ethernet says:
> "10GBASE-T has higher latency and consumes more power than other 10
> gigabit Ethernet physical layers. In 2008 10GBASE-T silicon is now
> available from several manufacturers with claimed power dissipation
> of 6W and a latency approaching 1 microsecond"
> 1 microsecond doesn't sound bad.. :)
That PDF claims this:
- latency 2.6 us
- power per port: 4-6W/port
- price per port: $400
- max distance: 100m
10 Gbit SFP+:
- latency 0.3 us
- power per port: 1.5W
- price per port: $40
- max distance: 8.5m
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