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AMS-IX Breaks 4 Terabits per Second Barrier

ams-ix.net

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Re: AMS-IX Breaks 4 Terabits per Second Barrier

#51

Post by porges »

ejol wrote: post #30
porges wrote: post #16

Earlier quoted context omitted.

Something does seem funky. The website looked like this in 1997: http://web.archive.org/web/19970418234503id_/http://www.bath... [This page is 3,780 bytes.] In fact, you can find the server stats from back then: http://web.archive.org/web/19970822145424/http://www.bath.ac... This says that it transferred "3 599 Mbytes" and there were "728 506" requests. Interpreting "3 599" as 3.599 gives 4.94 bytes per request, whic…

Why would you interpret 3 599 Mbytes as 3.599, and not as 3599 Mbytes? 3599MB/728506 = 4.95 kB (assuming 1000 kB in an MB).

Because that seems to be what the person who came up with the "63 MB" figure has done.

Re: AMS-IX Breaks 4 Terabits per Second Barrier

#52

Post by georgerobinson »

zifnab06 wrote: post #47
Ecco wrote: post #43

Those numbers seem very low to me, I feel like something doesn't add up. Indeed, 1 GBits FTTx offers from FAI are getting more and more widespread, so that would mean that the peak traffic is around only 4000 simultaneous users?

Usage vs capacity. I have Gbit service at home, but I'm not saturating the link 24/7.

Genuine question! Have you ever been able to saturate your connection with a single TCP stream or did it require multiple streams (possibly from multiple devices)?

Re: AMS-IX Breaks 4 Terabits per Second Barrier

#53

Post by georgerobinson »

jo909 wrote: post #48
Tepix wrote: post #35

Earlier quoted context omitted.

Try this bandwidth calculator (it's in German, but I think it's not hard to understand) http://www.heise.de/netze/tools/bandbreitenrechner/

You are missing my point: the raw bit rate of the network is not the rate of file transfers. There is a bunch of logic around the raw bits in the wire that make it mich more complicated than dividing by 8

For example, the TCP throughput equation which can be expressed by the following http://www.mathcs.emory.edu/~cheung/Courses/558/Syllabus/07-... (depending on your degree of accuracy).

Re: AMS-IX Breaks 4 Terabits per Second Barrier

#54

Post by AdamJacobMuller »

deugtniet wrote: post #22
usethis wrote: post #9

Earlier quoted context omitted.

Full updated list is here: https://en.wikipedia.org/wiki/List_of_Internet_exchange_poin...

Well, to be fair, AMS-IX is located around the Amsterdam Area (a circle of around 30 km orso), while DE-CIX has locations in the US as well. I'm not familiar with the specifics, but based on these locations, I'd say AMS-IX is the biggest internet exchange serving europe.

Both DE-CIX and AMS-IX have exchanges in NYC now. Both have actually started branching out and building exchanges in many new cities. The traffic levels they're talking about are specific to both of their home markets (Amsterdam/Frankfurt).

DE-CIX has the same "metro" setup as AMS-IX as well, they're in a large number of locations https://www.de-cix.net/products-services/de-cix-frankfurt/ in the Frankfurt metro area.

Re: AMS-IX Breaks 4 Terabits per Second Barrier

#55

Post by AdamJacobMuller »

deugtniet wrote: post #22
usethis wrote: post #9

Earlier quoted context omitted.

Full updated list is here: https://en.wikipedia.org/wiki/List_of_Internet_exchange_poin...

Well, to be fair, AMS-IX is located around the Amsterdam Area (a circle of around 30 km orso), while DE-CIX has locations in the US as well. I'm not familiar with the specifics, but based on these locations, I'd say AMS-IX is the biggest internet exchange serving europe.

Both DE-CIX and AMS-IX have exchanges in NYC now. Both have actually started branching out and building exchanges in many new cities. The traffic levels they're talking about are specific to both of their home markets (Amsterdam/Frankfurt).

DE-CIX has the same "metro" setup as AMS-IX as well, they're in a large number of locations https://www.de-cix.net/products-services/de-cix-frankfurt/ in the Frankfurt metro area.

Re: AMS-IX Breaks 4 Terabits per Second Barrier

#56

Post by rottyguy »

jo909 wrote: post #48
Tepix wrote: post #35

Earlier quoted context omitted.

Try this bandwidth calculator (it's in German, but I think it's not hard to understand) http://www.heise.de/netze/tools/bandbreitenrechner/

You are missing my point: the raw bit rate of the network is not the rate of file transfers. There is a bunch of logic around the raw bits in the wire that make it mich more complicated than dividing by 8

Actually, the real point is that the average person doesn't need engineering precision which is my original point. Whether it's 60sec or 65sec to xfer a file doesn't matter to them. Engineers always like to argue precision to justify complexity and lose sight of the larger picture (eg. consumers/majority matter).

btw- how does expression it in bits v/s bytes help you with your desired calculations?

Re: AMS-IX Breaks 4 Terabits per Second Barrier

#57

Post by jo909 »

rottyguy wrote: post #56
jo909 wrote: post #48

Earlier quoted context omitted.

You are missing my point: the raw bit rate of the network is not the rate of file transfers. There is a bunch of logic around the raw bits in the wire that make it mich more complicated than dividing by 8

Actually, the real point is that the average person doesn't need engineering precision which is my original point. Whether it's 60sec or 65sec to xfer a file doesn't matter to them. Engineers always like to argue precision to justify complexity and lose sight of the larger picture (eg. consumers/majority matter). btw- how does expression it in bits v/s bytes help you with your desired calculations?

You brought up math. I never disputed that 100MB / 12.5MByte/s is slightly easier than 100MB / 100Mbit/s. I'm just saying that calculation, in both forms, gives a very inaccurate answer to how long a file transfer will take, which is what you brought up as the big reason.

An easier and better answer is what jdiez17 described: just divide by 10. I.e. 100Mbit/s link speed is approximate 10MB/s of data transfer.

All of that has nothing to do with bits vs bytes.

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