3 ms·
Microwave and fiber for long haul. Ethernet is still viable in the LAN. With solarflare/mellanox nics + kernel bypass you can get a message from wire the memo
by itchyouch 8y ago
Microwave and fiber for long haul.
Ethernet is still viable in the LAN. With solarflare/mellanox nics + kernel bypass you can get a message from wire the memory in around 2-3 microseconds. The layer 3 10/40g ultra low latency switch offerings can pass a frame port to port in 200ns while layer 2 offering can do it in 5-50ns depending on how many features are stripped away.
HFT firms use FPGAs with integrated nics as well. Pci-e Latency to pass a message is around 800ns.
For the ULL crowd, when the money opportunity arises, everyone is stampeding to that order to get there first and causes a micro/nanosecond level spike of messaging/activity. FPGAs are great at staying deterministic during this burst.
But alas, i digress. Ethernet is still used and can be wicked fast.