nanog mailing list archives
Re: How do you put a TV station on the Mbone?
From: William Herrin <bill () herrin us>
Date: Wed, 4 May 2011 18:20:09 -0400
On Fri, Apr 29, 2011 at 4:40 PM, Tim Durack <tdurack () gmail com> wrote:
Multicast is a great technical solution in search of a good business problem.
It's a useful replacement for broadcast on a local link. It's of limited utility elsewhere. On Fri, Apr 29, 2011 at 5:21 PM, George Bonser <gbonser () seven com> wrote:
Multicast is perfect for a live event. Unicast is best for "on demand" viewing of something.
A layered cache implemented via unicast would work better and enable local fills for lost packets too. More, it sits to the side of the routers rather than in line, so it allows your routers to focus on what they do well: routing unicast packets. Some time ago I sketched out a notion for a layered opportunistic caching system that finds its nearest caches via anycast and validates the cached data via a very small signature stream from the original source. Even if your viewing is off-sync with others using the caches in your hierarchy the probability of bandwidth savings increases rapidly with the popularity of the content. The idea is that you deploy these caches as deep in your system as is cost effective. Regionally. The local CO. In the box with the neighborhood fiber terminal if you find the traffic savings beats the equipment cost. And of course such a cache system could work well for popular non-streamed content as well. Never quite linked up with someone interested in seeing an implementation though... Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Re: How do you put a TV station on the Mbone?, (continued)
- Re: How do you put a TV station on the Mbone? Jay Ashworth (May 05)
- Re: How do you put a TV station on the Mbone? Scott Helms (May 04)
- Re: How do you put a TV station on the Mbone? Jeff Young (May 04)
- Re: How do you put a TV station on the Mbone? Loránd Jakab (May 05)
- Re: How do you put a TV station on the Mbone? Michael Dillon (May 07)
- Re: How do you put a TV station on the Mbone? Jeffrey S. Young (May 08)
- Re: How do you put a TV station on the Mbone? Jay Ashworth (May 08)
- Re: How do you put a TV station on the Mbone? Charles Morris (May 06)
- RE: How do you put a TV station on the Mbone? George Bonser (May 06)
- Re: How do you put a TV station on the Mbone? Scott Helms (May 06)
- Re: How do you put a TV station on the Mbone? Valdis . Kletnieks (May 04)