5 ms·
Yah, if you really want it hammered home, find something that is considered a long fat pipe and try to max it out. About a decade ago, one of our customers had
by StillBored 4y ago
Yah, if you really want it hammered home, find something that is considered a long fat pipe and try to max it out.
About a decade ago, one of our customers had a 25Gbit (IIRC) line that went cross country and had something like 150ms of latency. Then after hours they would basically cross replicate their entire data center through a couple machines they purchased from us (running some of our software). While their packet loss was fairly trivial, it was enough to cause some serious pain. Explaining why, if they insisted on TCP they were going to need an enormous amount of ram (for the time) in order to keep the thing running at line rate took about 6 months... Eventually someone ponied up the $$$$ for the ram, and the problem went away, and it sat there happily doing its thing, with only the occasional problems caused by other departments trying their own experiments and killing its throughput.
- eru 4y agoBBR for TCP should improve things?
- quickthrower2 4y agoWould UDP and something like bittorrent help?
- dumpsterdiver 4y ago(freezes) Did anyone else just hear something? No? Must have been the wind...
- nix23 4y agoWhy you freeze?
- worthless-trash 4y agoRoleplaying an NPC changing state maybe.
- nix23 4y agoI would argue that drbd is the right thing 24x7 or zfs send. The problem with kind of bittorrent is, you have to retransfer the whole block and not just the packet, but could work too, interesting.
- dangerface 4y agoThe issue is TCP's congestion control needs to wait for an ack before sending the next packet so the latency kills throughput. Changing to UDP would get rid of the congestion control but UDP on its own would have congestion issues killing its throughput. Bittorrent created their own congestion control called ledbat and then added that onto UDP to create UTP which could help. There is also UDT which has its own congestion control algorithm designed for 10gbps+ connections, which would significantly fix the issue.