[132905] in North American Network Operators' Group
Re: The scale of streaming video on the Internet.
daemon@ATHENA.MIT.EDU (Jack Bates)
Thu Dec 2 16:31:28 2010
Date: Thu, 02 Dec 2010 15:31:21 -0600
From: Jack Bates <jbates@brightok.net>
To: david raistrick <drais@icantclick.org>
In-Reply-To: <alpine.BSF.2.00.1012021620060.26089@murf.icantclick.org>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 12/2/2010 3:23 PM, david raistrick wrote:
> Have you ever actually been involved with really large scale multicast
> implementations? I take it that's a no.
>
Nope. I prefer small scale. :)
> The -only- way that would work internet wide, and it defeats the
> purpose, is if your client side created a tunnel back to your multicast
> source network. Which would mean you're carrying your multicast data
> over anycast.
>
So we don't use multicast, fallback to unicast deployments on the
Internet today for various events/streams?
> If you, the multicast broadcaster, dont have extensive control of the
> -entire- end to end IP network, it will be significantly broken
> significant amounts of the time.
Clients can't fallback to unicast when multicast isn't functional? I'd
expect multicast to save some bandwidth, not all of it.
>
> ...david (former member of a team of engineers who built and maintained
> a 220,000 seat multicast video network)
Cool. I did a 3 seat multicast video network, and honestly am largely
ignorant of multicast over the Internet (on my list!) but do listen to
people discuss it. :P
Jack
