On Dec 3, 2010, at 9:16 AM, Neil Harris wrote: > On 02/12/10 20:21, Leo Bicknell wrote: >> Comcast has around ~15 million high speed Internet subscribers (based on >> year old data, I'm sure it is higher), which means at peak usage around >> 0.3% of all Comcast high speed users would be watching. >> >> That's an interesting number, but let's run back the other way. >> Consider what happens if folks cut the cord, and watch Internet >> only TV. I went and found some TV ratings: >> >> http://tvbythenumbers.zap2it.com/2010/11/30/tv-ratings-broadcast-top-25-sunday-night-football-dancing-with-the-stars-finale-two-and-a-half-men-ncis-top-week-10-viewing/73784 >> >> Sunday Night Football at the top last week, with 7.1% of US homes >> watching. That's over 23 times as many folks watching as the 0.3% in >> our previous math! Ok, 23 times 150Gbps. >> >> 3.45Tb/s. >> >> Yowzer. That's a lot of data. 345 10GE ports for a SINGLE TV show. >> >> But that's 7.1% of homes, so scale up to 100% of homes and you get >> 48Tb/sec, that's right 4830 simultaneous 10GE's if all of Comcast's >> existing high speed subs dropped cable and watched the same shows over >> the Internet. >> >> I think we all know that streaming video is large. Putting the real >> numbers to it shows the real engineering challenges on both sides, >> generating and sinking the content, and why comapnies are fighting so >> much over it. >> >> > > You might be interested in the EU-funded P2P-NEXT research initiative, which > is creating a P2P system capable of handling P2P broadcasting at massive > scale: > > http://www.p2p-next.org/
This already exists in China. http://www.ietf.org/proceedings/77/slides/P2PRG-3.pdf Regards Marshall > > -- Neil > > (full disclosure: I'm associated with one of the participants in the project) > > >
