nanog mailing list archives
Re: Network end users to pull down 2 gigabytes a day, continuously?
From: Gian Constantine <constantinegi () corp earthlink net>
Date: Wed, 10 Jan 2007 00:43:39 -0500
There you go. SSM would be a great solution. Who the hell supports it, though?
We still get back to the issue of large scale market acceptance. High take rate will be limited to the more popular channels, which are run by large media conglomerates, who are reluctant to let streams out of a closed network.
Gian Anthony Constantine Senior Network Design Engineer Earthlink, Inc. Office: 404-748-6207 Cell: 404-808-4651 Internal Ext: x22007 constantinegi () corp earthlink net On Jan 10, 2007, at 12:08 AM, Sean Donelan wrote:
On Tue, 9 Jan 2007, Valdis.Kletnieks () vt edu wrote:Multicast streaming may be a big win when you're only streaming the top5 or 10 networks (for some value of 5 or 10). What's the performancecharacteristics if you have 300K customers, and at any given time, 10% are watching something from the "long tail" - what's the difference between handling 30K unicast streams, and 30K multicast streams that each have onlyone or at most 2-3 viewers?1/2, 1/3, etc the bandwidth for each additional viewer of the same stream? The worst case for a multicast stream is the same as the unicast stream, but the unicast stream is always the worst case.Multicast doesn't have to be real-time. If you collect interested subscribers over a longer time period, e.g. scheduled downloads over the next hour, day, week, month, you can aggregate more multicast receivers through the same stream. TiVo collects its content using a broadcastschedule.A "long tail" distribution includes not only the tail, but also the head. 30K unicast streams may be the same as 30K multicast streams, but30K multicast streams is a lot better than 300,000 unicast streams.Although the long tail steams may have 1, 2, 3 receivers of a stream, the Parato curve also has 1, 2, 3 streams with 50K, 25K, 12K receivers.With Source-Specific Multicast addressing there isn't a shortage of multicast addresses for the typical broadcast usage. At least not untilwe also run out of IPv4 unicast addresses.There is rarely only one way to solve a problem. There will be multipleways to distribute data, video, voice, etc.
Current thread:
- Re: Network end users to pull down 2 gigabytes a day, continuously?, (continued)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Joe Abley (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Gian Constantine (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Marshall Eubanks (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Gian Constantine (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Valdis . Kletnieks (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? John Kristoff (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Gian Constantine (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Sean Donelan (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Valdis . Kletnieks (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Sean Donelan (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Gian Constantine (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Petri Helenius (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Marshall Eubanks (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Marshall Eubanks (Jan 09)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Michal Krsek (Jan 10)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Michal Krsek (Jan 10)
- RE: Network end users to pull down 2 gigabytes a day, continuously? Frank Bulk (Jan 12)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Gian Constantine (Jan 12)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Michal Krsek (Jan 12)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Mikael Abrahamsson (Jan 12)
- Re: Network end users to pull down 2 gigabytes a day, continuously? Steve Sobol (Jan 12)