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25 Gbit/s at home, part 1

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Re: 25 Gbit/s at home, part 1

#141

Post by tgtweak »

thefz wrote: post #124

I have been on 7Mbps / 1Mbps until 2021. Moved in with GF, she had 100Mbps ADSL which blew my mind. Now we have 2.5Gbps FTTH and I feel blessed. I'm moving to a slightly remote place soon which has 200Mbps FWA, and still it blows my mind. I can't imagine having 25Gbps at home. Insane. Downloads matter up to an extent. What still gives me day 1 shivers is 600Mbps upload after years at 1, and sub-10ms latency.

I remember going from 56kbps dial-up (getting about 5-6KB/s) to a T1 and downloading an mp3 went from 20 minutes to 30 seconds. Diminishing returns past that point for sure :)

Re: 25 Gbit/s at home, part 1

#143

Post by denysvitali »

sschueller wrote: post #53

If you want to know more about init7s network and how they can provide 25gbits see this presentation they did https://youtu.be/wXmJCzMeIBo

The most beautiful part of it is that no matter what fiber plan you pick, the price is always 777 CHF/year.

This effectively means that the only thing stopping you from getting a 25 Gbps connection is, well, the fiber connection and the hardware

Re: 25 Gbit/s at home, part 1

#144

Post by denysvitali »

avidiax wrote: post #126
neals wrote: post #63

I'm a proud owner of a 1 Gbit/s fiber connection with a 100 Mbit (wired) network in my house. I want to upgrade it to match, but I don't want to go through the effort because I never run into download times for anything.

I have 10gbit service, 1gb internal network. So like you, but 1 generation forward. I don't usually saturate 1gbps, but I definitely saturate 100mbps with XBOX downloads, any cloud provider, torrents, etc. You could probably pull your old cables fairly easily. Attach two wire pull tapes or strings to the old cable, pull the old cable out with plenty of wire pulling lubricant, and then use one tape/string to pull a Ca…

Do yourself a favor: buy some fiber cables, two switches and connect both ends like that. This is the only way to "future proof" it (past 1 Gbps) and will avoid you pulling cables for a while - I hope.

Re: 25 Gbit/s at home, part 1

#145

Post by shrubble »

tgtweak wrote: post #122
shrubble wrote: post #49

Earlier quoted context omitted.

Not sure what you see, but I always multiply transfers times 10 to estimate bandwidth, since there is some overhead in the TCP/IP protocol. So 280MB/s I would estimate being about 2.8gbps...

I think ethernet (1500mtu standard) has about 30 bytes of packet routing information per (max) 1500 bytes of data. That works out to 2% minimum. On smaller data packets (less than 1.5kb) it would be a much higher percentage. TLS on top of that, once you're out of the handshake, is about 40 bytes. those 40 bytes would be inside that 1500 window. Assuming 1460 bytes of data (best case) with 40 bytes of TLS and 30 bytes…

I am not sure if the original poster is talking about downloading over https and, whether he is mentioning the data rate or the file size. For instance you download a 1gbyte file in 4 seconds - your effective data rate in terms of what you want to see on your disk is 250Mbytes/second ; but if you measure the actual data rate it would be more due to both TCP/IP and, application layer overhead.

Re: 25 Gbit/s at home, part 1

#146

Post by yownie »

virtuallynathan wrote: post #75
tgtweak wrote: post #20

Recently moved up to 3gbps bidirectional and had a hell of a time getting 3gbps even with 10gbps network card directly into the 10gbps port on the ISP-provided modem. In addition to this, there are very few services that will actually feed you data at 3gbps. Steam - ~280MB/s (2.2gbps) Battle.net launcher - ~140MB/s (1.1gbps) 25GB Torrent with 1000+ seeders - ~70MB/s (~560mbps) 2GB iso from github - ~80MB/s (~650mbps)…

I just upgraded to 10GbE service from Ziply Fiber in the Seattle area: Speedtest.net - ~9.3Gbps symmetric iperf to Denver: ~9.3Gbps symmetric (~8 threads) iperf to Minneapolis: ~9.3Gbps symmetric AWS S3 Download with small files: 1.3Gbps Usenet download: 7-9.5Gbps Mounting my ZFS pool to an AWS instance via SMBv3 in us-west-2: 3Gbps (not clear what the limit was here) GitHub (400MB): 1 thread 400Mbps, 16 threads: 3.3…

>Mounting my ZFS pool to an AWS instance via SMBv3 in us-west-2: 3Gbps (not clear what the limit was here)

this one sounds interesting and definitely a writeup I would read about.

Re: 25 Gbit/s at home, part 1

#147

Post by civiloid »

shrubble wrote: post #145
tgtweak wrote: post #122

Earlier quoted context omitted.

I think ethernet (1500mtu standard) has about 30 bytes of packet routing information per (max) 1500 bytes of data. That works out to 2% minimum. On smaller data packets (less than 1.5kb) it would be a much higher percentage. TLS on top of that, once you're out of the handshake, is about 40 bytes. those 40 bytes would be inside that 1500 window. Assuming 1460 bytes of data (best case) with 40 bytes of TLS and 30 bytes…

I am not sure if the original poster is talking about downloading over https and, whether he is mentioning the data rate or the file size. For instance you download a 1gbyte file in 4 seconds - your effective data rate in terms of what you want to see on your disk is 250Mbytes/second ; but if you measure the actual data rate it would be more due to both TCP/IP and, application layer overhead.

There is a more concrete example - in the article I've showed iperf3 output, which gave 23.5 Gbit/s - that is actual data. Raw speed was ~24.9-25. Everything else is overhead in that case.

Re: 25 Gbit/s at home, part 1

#148

Post by microtonal »

k8sToGo wrote: post #71
microtonal wrote: post #29

Earlier quoted context omitted.

Yeah, that is also what I found. 'Just' 1gbs fiber, but downloads are often bottlenecked by the server, especially things like GitHub.

You sure it is the server and not routing?

Nope. There are plenty of servers that do push 1 Gbit, my provider has very good peering, and really close to several CDNs.

Re: 25 Gbit/s at home, part 1

#149

Post by fulafel »

GuB-42 wrote: post #128

The hardest part, I think, is making use of that speed. 25 GBps is about the sequential speed of a decent NVMe SSD, and much faster than anything SATA. It is also faster than what a CPU can handle for all but the most basic of processing. Working at GBytes/s speeds require serious performance considerations when coding, often involving working with assembly, SIMD, etc... Things like the TCP stack start being a bottle…

I think this shows a mindset difference in how we think about net connectivity vs other capacities. For things like power grid connections, car horsepowers etc, we like to size things so that we don't max them out very often.

For eg a 150 GB game download on your console, a 25G connection sounds useful.

And of course a fast connection also enables new kinds of applications when enough people have them (eg game consoles could use networked on-demand storage for assets so wouldn-t be size limited by console SSD capacities). As long as bandwidth is very unequal between users, the faster end doesn't get applications built for it. That's why we should enact policies that make fast connections widely available. Fiber is cheap after all.

Re: 25 Gbit/s at home, part 1

#150

Post by civiloid »

denysvitali wrote: post #144
avidiax wrote: post #126

Earlier quoted context omitted.

I have 10gbit service, 1gb internal network. So like you, but 1 generation forward. I don't usually saturate 1gbps, but I definitely saturate 100mbps with XBOX downloads, any cloud provider, torrents, etc. You could probably pull your old cables fairly easily. Attach two wire pull tapes or strings to the old cable, pull the old cable out with plenty of wire pulling lubricant, and then use one tape/string to pull a Ca…

Do yourself a favor: buy some fiber cables, two switches and connect both ends like that. This is the only way to "future proof" it (past 1 Gbps) and will avoid you pulling cables for a while - I hope.

You can make it work with 2.5GbE and maybe even 10 GbE with some luck. But looking at its current state and price I personally would agree that fiber is more future proof.
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