[Bloat] [Cerowrt-devel] DC behaviors today

[David Collier-Brown]

Do you think that "RTT to San Francisco" is a clear enough, predictable 
enough measure that we can use it in the context of non-technical users 
and obfuscating salescritters?

--dave
who vaguely watched RTT to Charlottetown PEI, Vancouver and Washington 
DC in a previous life


On 04/12/17 02:59 PM, dpreed at reed.com wrote:
>
> I suggest we stop talking about throughput, which has been the 
> mistaken idea about networking for 30-40 years.
>
> Almost all networking ends up being about end-to-end response time in 
> a multiplexed system.
>
> Or put another way: "It's the Latency, Stupid".
>
> I get (and have come to expect) 27 msec. RTT's under significant load, 
> from Boston suburb to Sunnyvale, CA.
>
> I get 2 microsecond RTT's within my house (using 10 GigE).
>
> What will we expect tomorrow?
>
> This is related to Bufferbloat, because queueing delay is just not a 
> good thing in these contexts - contexts where Latency Matters. We 
> provision multiplexed networks based on "peak capacity" never being 
> reached.
>
> Consequently, 1 Gig to the home is "table stakes". And in DOCSIS 3.1 
> deployments that is what is being delivered, cheap, today.
>
> And 10 Gig within the home is becoming "table stakes", especially for 
> applications that need quick response to human interaction.
>
> 1 NvME drive already delivers around 11 Gb/sec at its interface. 
> That's what is needed in the network to "impedance match".
>
> 802.11ax already gives around 10 Gb/sec. wireless (and will be on the 
> market soon).
>
> The folks who think that having 1 Gb/sec to the home would only be 
> important if you had to transfer at that rate 8 hours a day are just 
> not thinking clearly about what "responsiveness" means.
>
> For a different angle on this, think about what the desirable "channel 
> change time" is if a company like Netflix were covering all the 
> football (I mean US's soccer) games in the world. You'd like to fill 
> the "buffer" in 100 msec. so channel change to some new channel is 
> responsive. 100 msec. of 4K sports, which you are watching in "real 
> time" needs to be buffered, and you want no more than a second or two 
> of delay from camera to your screen. So buffering up 1 second of a 
> newly selected 4 K video stream in 100 msec. on demand is why you need 
> such speeds. Do the math.
>
> VR sports coverage - even moreso.
>
>
>
> On Monday, December 4, 2017 7:44am, "Mikael Abrahamsson" 
> <swmike at swm.pp.se> said:
>
> > On Mon, 4 Dec 2017, Pedro Tumusok wrote:
> >
> > > Looking at chipsets coming/just arrived from the chipset vendors, 
> I think
> > > we will see CPE with 10G SFP+ and 802.11ax Q3/Q4 this year.
> > > Price is of course a bit steeper than the 15USD USB DSL modem :P, but
> > > probably fits nicely for the SMB segment.
> >
> > 
> https://kb.netgear.com/31408/What-SFP-modules-are-compatible-with-my-Nighthawk-X10-R9000-router
> >
> > This has been available for a while now. Only use-case I see for it is
> > Comcast 2 gigabit/s service, that's the only one I know of that 
> would fit
> > this product (since it has no downlink 10GE ports).
> >
> > --
> > Mikael Abrahamsson email: swmike at swm.pp.se
> > _______________________________________________
> > Cerowrt-devel mailing list
> > Cerowrt-devel at lists.bufferbloat.net
> > https://lists.bufferbloat.net/listinfo/cerowrt-devel
> >
>
>
>
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-- 
David Collier-Brown,         | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
davecb at spamcop.net           |                      -- Mark Twain

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