Michael Dillon <michael@memra.com> wrote:
Are you sure that creative ways of using lots of smaller T3 bandwidth boxes couldn't solve the problem?
There are hard architectural limits on the number of core routers in the defaultless backbone. Backbone has to have a relatively small number of BGP speakers, to avoid severe routing information propagation problems. There _are_ "creative ways", see for example SprintLink presentations on NANOG, the planned "3-dimensional grid" backbone topology (it allows to grow the aggregate capacity to about OC-3). However, you inevitably run into capacity limitation of LAN interconnects. Then, there's a problem with load balancing, as it generally cannot be done with exterior protocols which have to select a single path. (And there's no easy way to do per-destination load distribution on a large scale). It's only a kludge to survive until (and if) somebody will build real central-office routers.
If you are right, then yes it sucks. Obvoiusly the ATM and OC3 technologies are right where you have pegged them, but what about parallelism using existing DS3 technology? And if this is done, are there mux/demux boxes that can handle DS3's<->OC3 ?
There are boxes which can *statically* mux/demux OC-192 to DS-3s. Synchronous muxes is not a high technology, being basicallly decorated shift registers.
One nice side effect is that this may force the video-on-demand folks off the Internet and into straight ATM instead. I rather like the future scenario where the globe is girdled by an IPng data network and a separate parallel video/ATM network.
That already happened. I would rather see things going in opposite deirection. (For VOD applications ATM is adequate, as it only demultiplexes big pipes from VOD servers into small access pipes; there's no backwards data flow, and no statistical multiplexing). However, the utility of VOD is very questionable, as the basic need to see the movie quite adequately and cheaply satisfyed by low-tech video rentals. It is not a "killer application", definitely. Video telephony and distributed computing network can be such applications but they beg for symmetrical IP connectivity. --vadim
However, the utility of VOD is very questionable, as the basic need to see the movie quite adequately and cheaply satisfyed by low-tech video rentals.
In a cost/benefit tradeoff, delivering videos like pizza (including 30 minutes or free) is probably really a more efficient way to go than wrapping them into packets (or cells). At least for the time being. Just need a good way to pick'em up next day, a problem resolved for pizza for ages already as well (translation into something volatile after use).
This, of course, is way off "links on the blink" but I couldn't resist... because both statements, will all due respect, are lacking a key ingredient: vision : Vadim:
However, the utility of VOD is very questionable, as the basic need to see the movie quite adequately and cheaply satisfyed by low-tech video rentals.
HWB:
In a cost/benefit tradeoff, delivering videos like pizza (including 30 minutes or free) is probably really a more efficient way to go than wrapping them into packets (or cells). At least for the time being. Just need a good way to pick'em up next day, a problem resolved for pizza for ages already as well (translation into something volatile after use).
The above worldviews, with all due respect, are very similar to those who predicted that the Movie Theather Business would die when when VCRs and Home Video hit the market. The opposite occured, as we all know, box office receipts skyrocketed to all time highs and remain high. People enjoy sitting in a room with strangers laughing a the same scene, crying, munching pop corn in the dark. In a different vein, but similar realism, as the Internet continues to grow and to be accepted mainstream, people will enjoy sitting on their terminal at work or at play, surf to their favorite WWW video site, open up a window and look at the featured movies , or search the archives for something difficult to find and not quite as mainstream as the limited selection in Your Local Area Video Store. I do not think that the future holds Pizza-Delivery style videos only, guys. Especially for those whom are elderly, sick, live in rural areas, live in crime-dangerous areas, the technically elite, students, parents seeking educational films for their children, people and organizations distributing low-budget film media, sophisticated consumers bored with pop culture, international and foreign language customers..... The possibilities are endless..... Only acute tunnel-vision-itis would affect someone to think that the video market is only for the healthy, young, pop culture types that cruise the local video store. Regards, Tim -- +--------------------------------------------------------------------------+ | Tim Bass | #include<campfire.h> | | Principal Network Systems Engineer | for(beer=100;beer>1;beer++){ | | The Silk Road Group, Ltd. | take_one_down(); | | | pass_it_around(); | | http://www.silkroad.com/ | } | | | back_to_work(); /*never reached */ | +--------------------------------------------------------------------------+
On Thu, 9 Nov 1995, Tim Bass wrote:
are lacking a key ingredient: vision :
site, open up a window and look at the featured movies , or search the archives for something difficult to find and not quite as mainstream as the limited selection in Your Local Area Video Store.
Not likely.... Here's the vision. The video stores will operate humungo video caching servers with an ATM pipe to the franchise head office where *EVERY* movie ever made will be stored. You will be able to order any movie on the store's caching server and pick up a freshly made copy 20 minutes later. If they have to go to head office for it you will get it in 30 minutes. Since you have to go to the store anyway to stock up on potato chips, some drinks and to flirt with the pretty girl behind the counter this will be reason enough to pick up the tape. 20 years from now it will be just the same only using magneto-optical disks...
The possibilities are endless..... Only acute tunnel-vision-itis would affect someone to think that the video market is only for the healthy, young, pop culture types that cruise the local video store.
If those folks don't use VOD then it will be too expensive to implement a pervasive VOD network until videotel and videoconferencing have paid for the infrastructure. Michael Dillon Voice: +1-604-546-8022 Memra Software Inc. Fax: +1-604-542-4130 http://www.memra.com E-mail: michael@memra.com
participants (5)
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bmanning＠ISI.EDU -
hwb＠upeksa.sdsc.edu -
Michael Dillon -
Tim Bass -
Vadim Antonov