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AWS data center latencies, visualized

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Re: AWS data center latencies, visualized

#41

Post by renatovico »

adamcharnock wrote: post #23

Random fact: I did some planning around this for a client a while ago. While measuring the AWS latencies I found I could get approximate latencies (within 10%) by measuring the rough undersea cable length (km) and dividing by 150. While not overly surprising, it was very consistent. Edit: I think it was actually 155

I think this is because of medium velocity of light

"Through LabVIEW the speed of light in the optical fiber is calculated to be ~ 2.054 x 108 m/s corresponding to a refractive index of n ≈ 1.4606 which is a typical value" https://web.phys.ksu.edu/posters/2009/juma-Adv-Lab-S09.pdf

Re: AWS data center latencies, visualized

#42

Post by sandos »

Its a bit sad, we have one of the Swedish, actual physical buildings for AWS in my town. But of course the traffic does not exit here, but is instead aggregated between the different sites spread around cities regionally. So no sub-ms latencies for me towards that center. I think the traffic basically went a couple hundred kms before turning back here.

Re: AWS data center latencies, visualized

#43

Post by keepamovin »

Hikikomori wrote: post #38
keepamovin wrote: post #36

Earlier quoted context omitted.

This page is such a well executed interactive map. Really enjoyed it Is the math-planation of your random fact basically ( thanks to https://news.ycombinator.com/user?id=Hikikomori for correcting the lightspeed in fibre medium from 3e5 to 2e5 ! ) - lightspeed is 2e5 km/s ~ 2e2 km/ms, so/ - length (km) / 200 (km)/ms ~ K length (km) / 200 (km)/ms, so - latency (ms) ~ K' length (km) Where K is approximately 1.3 (K' is 1…

Speed of light in a medium like fiber is about 200 000km/s.

Oh shit! Thanks. Good point. That actually makes it more plausible, as K is smaller.

Re: AWS data center latencies, visualized

#44

Post by immibis »

sandos wrote: post #42

Its a bit sad, we have one of the Swedish, actual physical buildings for AWS in my town. But of course the traffic does not exit here, but is instead aggregated between the different sites spread around cities regionally. So no sub-ms latencies for me towards that center. I think the traffic basically went a couple hundred kms before turning back here.

I presume your town is too small for it since you called it a town, but AWS also does these things called "wavelength zones" which are as close as possible to certain cellular networks (designed to ride th 5G M2M hype train - self-driving vehicles, etc). Not sure if they do something similar for fixed networks.

Of course, it doesn't actually matter since friends don't let friends use AWS.

Re: AWS data center latencies, visualized

#46

Post by immibis »

otabdeveloper4 wrote: post #32
alex_young wrote: post #21

Us-east-1 is hard to beat. Close to the network centrality of the of the internet, low latency to both the west coast and Europe.

> Close to the network centrality of the of the internet Most of the Internet is fractured even though technically publically routable. E.g., for someone living in China the US isn't anywhere near "network centrality". If an internet centrality exists, it is somewhere in France or the Netherlands - usually cross-continent traffic goes through there, they have dedicated interchanges for that.

Agreed the network is much denser in Europe than the USA. This is obvious if you've really tried looking for network infrastructure services. The USA is just where a lot more high-level services are, like social media, due to the peculiarities of capitalism. There's no shortage of infrastructure there either, of course.

Data caps are apparently illegal here. This is good for the quality of infrastructure.

And if you have customers somewhere else you want to be in that place, or close to it network-wise.

Re: AWS data center latencies, visualized

#48

Post by albert_e »

interesting

the "globe" visualization is good ... but we cna only see half the world at a time ... can we have an option of a flat projection as well ... so I can see all latencies for a region at a glance?

ap-south-2 (Asia Pacific - Hyderabad,India) opened in Nov 2022 seems to be missing from the list?

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