Why not over the Internet?

Posted Nov 10, 2022 19:22 UTC (Thu) by NYKevin (subscriber, #129325)
In reply to: Why not over the Internet? by joib
Parent article: Moving past TCP in the data center, part 2

> That might actually be an issue, yes. If the idea is to not use packet drops as a congestion signal, how is congestion somewhere in the middle of the path detected? Guess you would need some kind of BBR-style timing based congestion control?

According to https://homa-transport.atlassian.net/wiki/spaces/HOMA/pages/262171/Concerns+Raised+About+Homa, this should not be a problem if different packets can be routed differently from each other.

In theory, you could still run out of bandwidth for the entire network overall, but that probably requires a much higher volume than is typical of a TCP-driven network, and should likely be dealt with using some combination of explicit provisioning and QoS (both of which are far more suitable to a closed DC-type network than to an open WAN).