Roderick.
From: NANOG on behalf
of adamv0...@netconsultings.com
Sent: Tuesday, June 23, 2020 10:20 AM
To: nanog@nanog.org ; l...@satchell.net
Subject: RE: 60 ms cross-continent
> Stephen Satchell via NANOG
> Sent: Monday, June 22, 2020 8:37 PM
>
> On 6/22/20 12:59 AM, adamv0...@ne
> Stephen Satchell via NANOG
> Sent: Monday, June 22, 2020 8:37 PM
>
> On 6/22/20 12:59 AM, adamv0...@netconsultings.com wrote:
> >> William Herrin
> >>
> >> Howdy,
> >>
> >> Why is latency between the east and west coasts so bad? Speed of
> >> light accounts for about 15ms each direction for a 30
from $185K per
month to $20K a month.
From: NANOG on behalf
of Joe Hamelin
Sent: Saturday, June 20, 2020 10:19 PM
To: Alejandro Acosta
Cc: NANOG list
Subject: Re: 60 ms cross-continent
On Sat, Jun 20, 2020 at 12:56 PM Alejandro Acosta
mailto:alejandroacostaal
From: NANOG on behalf
of Stephen Satchell via NANOG
Sent: Monday, June 22, 2020 9:37 PM
To: nanog@nanog.org
Subject: Re: 60 ms cross-continent
On 6/22/20 12:59 AM, adamv0...@netconsultings.com wrote:
>> William Herrin
>>
>> Howdy,
>>
>> Why is latency between the
On 6/22/20 12:59 AM, adamv0...@netconsultings.com wrote:
William Herrin
Howdy,
Why is latency between the east and west coasts so bad? Speed of light
accounts for about 15ms each direction for a 30ms round trip. Where does
the other 30ms come from and why haven't we gotten rid of it?
Wallstre
On Sat, Jun 20, 2020 at 12:56 PM Alejandro Acosta <
alejandroacostaal...@gmail.com> wrote:
> Hello,
>
> Taking advantage of this thread may I ask something?. I have heard of
> "wireless fiber optic", something like an antenna with a laser pointing
> from one building to the other, having said th
> William Herrin
>
> Howdy,
>
> Why is latency between the east and west coasts so bad? Speed of light
> accounts for about 15ms each direction for a 30ms round trip. Where does
> the other 30ms come from and why haven't we gotten rid of it?
>
Wallstreet did :)
https://www.wired.com/2012/08/ff_
Serious HFT moved to shortwave years ago. The chicago-NYC routes by
microwave still exist, but are only for things that need higher data rates
(as measured in kbps). It's hard to hide a giant log-periodic or yagi-uda
antenna. The sites near Chicago that are aimed at London are well known to
those i
> > This is a nice plot for a movie, but not how HFT is really done. It's so
> > much easier to colocate on the same datacenter of the exchange and run
> > algorithms from there; while those algorithms need humans to guide their
> > strategy, the human thought process takes a couple of seconds anyw
On 6/21/20 1:53 PM, Brett Frankenberger wrote:
On Sun, Jun 21, 2020 at 02:17:08PM -0300, Rubens Kuhl wrote:
On Sat, Jun 20, 2020 at 5:05 PM Marshall Eubanks
wrote:
This was also pitched as one of the killer-apps for the SpaceX
Starlink satellite array, particularly for cross-Atlantic and
cr
On Sun, Jun 21, 2020 at 02:17:08PM -0300, Rubens Kuhl wrote:
> On Sat, Jun 20, 2020 at 5:05 PM Marshall Eubanks
> wrote:
>
> > This was also pitched as one of the killer-apps for the SpaceX
> > Starlink satellite array, particularly for cross-Atlantic and
> > cross-Pacific trading.
> >
> >
> > ht
On Sat, Jun 20, 2020 at 5:05 PM Marshall Eubanks
wrote:
> This was also pitched as one of the killer-apps for the SpaceX
> Starlink satellite array, particularly for cross-Atlantic and
> cross-Pacific trading.
>
>
> https://blogs.cfainstitute.org/marketintegrity/2019/06/25/fspacex-is-opening-up-t
Mel Beckman wrote:
> An intriguing development in fiber optic media is hollow core optical
> fiber, which achieves 99.7% of the speed of light in a vacuum.
>
> https://www.extremetech.com/computing/151498-researchers-create-fiber-network-that-operates-at-99-7-speed-of-light-smashes-speed-and-late
On Sat, 20 Jun 2020 at 23:14, Bryan Fields wrote:
> I think he might be referring to the newer modulation types (QAM) on long haul
> transport. There's quite a bit of time in uS that the encoding takes into QAM
> and adding FEC. You typically won't see this at the plug-able level between
> swit
Did you not read my posting on Quora?
Tim
On 6/20/20 10:49 AM, Wayne Bouchard wrote:
And thus far, no one has mentioned switching speed and other
electronic overhead such as the transceivers (that's the big one,
IIRC.)
I also don't recall if anyone mentioned that the 30ms is as the
photon flie
On Sat, Jun 20, 2020 at 16:14 Bryan Fields wrote:
> On 6/20/20 1:56 PM, Saku Ytti wrote:
> > On Sat, 20 Jun 2020 at 20:52, Wayne Bouchard wrote:
> >
> >> And thus far, no one has mentioned switching speed and other
> >> electronic overhead such as the transceivers (that's the big one,
> >> IIRC.
On 6/20/20 1:56 PM, Saku Ytti wrote:
> On Sat, 20 Jun 2020 at 20:52, Wayne Bouchard wrote:
>
>> And thus far, no one has mentioned switching speed and other
>> electronic overhead such as the transceivers (that's the big one,
>> IIRC.)
> This will be something from tens of meters (low lat swich),
This was also pitched as one of the killer-apps for the SpaceX
Starlink satellite array, particularly for cross-Atlantic and
cross-Pacific trading.
https://blogs.cfainstitute.org/marketintegrity/2019/06/25/fspacex-is-opening-up-the-next-frontier-for-hft/
"Several commentators quickly caught onto
Hello,
Taking advantage of this thread may I ask something?. I have heard of
"wireless fiber optic", something like an antenna with a laser pointing
from one building to the other, having said this I can assume this link
with have lower RTT than a laser thru a fiber optic made of glass?
T
On 2020-06-20, at 19:07, Joel Jaeggli wrote:
>
> This is c in a vacuum. Light transmission through a medium is slower.
Ob-movie: https://en.wikipedia.org/wiki/The_Hummingbird_Project
Grüße, Carsten
On Sat, 20 Jun 2020 at 20:52, Wayne Bouchard wrote:
> And thus far, no one has mentioned switching speed and other
> electronic overhead such as the transceivers (that's the big one,
> IIRC.)
This will be something from tens of meters (low lat swich), to few
hundred meters (typical pipeline), t
And thus far, no one has mentioned switching speed and other
electronic overhead such as the transceivers (that's the big one,
IIRC.)
I also don't recall if anyone mentioned that the 30ms is as the
photon flies, not fiber distance.
-Wayne
On Sat, Jun 20, 2020 at 05:32:30PM +, Mel Beckman wro
An intriguing development in fiber optic media is hollow core optical fiber,
which achieves 99.7% of the speed of light in a vacuum.
https://www.extremetech.com/computing/151498-researchers-create-fiber-network-that-operates-at-99-7-speed-of-light-smashes-speed-and-latency-records
-mel
On Jun 2
Doing some rough back of the napkin math, an ultra low-latency path from, say,
the Westin to 1275 K in Seattle will be in the 59 ms range. This is
considerably longer than the I-90 driving distance would suggest because:
- Best case optical distance is more like 5500 km, in part because the path
Sent from my iPhone
> On Jun 20, 2020, at 9:27 AM, William Herrin wrote:
>
> Howdy,
>
> Why is latency between the east and west coasts so bad? Speed of light
> accounts for about 15ms each direction for a 30ms round trip. Where
> does the other 30ms come from and why haven't we gotten rid
Besides the refractive index of glass that makes like go about 2/3rds it
can in a vacuum, "Stuff" also includes many other things like
modulation/demodulation, buffers, etc. I did a quora answer on this you
can find at:
https://www.quora.com/How-can-one-describe-the-delay-characteristics-of-p
The speed of light in fiber is only about 2/3 the speed of light in a vacuum,
so that 15 ms is really about 22.5 ms. That brings the total to about 45 ms.
Some would come from how many miles of extra glass in that 2,742 miles in the
form of slack loops.
Some would come from fiber routes not
And of course in your more realistic example:
2742 miles = 4412 km ~ 44 ms optical rtt with no OEO in the path
On Sat, Jun 20, 2020 at 12:36 PM Tim Durack wrote:
> Speed of light in glass ~200 km/s
>
> 100 km rtt = 1ms
>
> Coast-to-coast ~6000 km ~60ms
>
> Tim:>
>
> On Sat, Jun 20, 2020 at 12:2
Speed of light in glass ~200 km/s
100 km rtt = 1ms
Coast-to-coast ~6000 km ~60ms
Tim:>
On Sat, Jun 20, 2020 at 12:27 PM William Herrin wrote:
> Howdy,
>
> Why is latency between the east and west coasts so bad? Speed of light
> accounts for about 15ms each direction for a 30ms round trip. Whe
On Sat, Jun 20, 2020 at 09:24:11AM -0700, William Herrin wrote:
> Howdy,
>
> Why is latency between the east and west coasts so bad? Speed of light
> accounts for about 15ms each direction for a 30ms round trip. Where
> does the other 30ms come from and why haven't we gotten rid of it?
>
> c = 18
30 matches
Mail list logo
