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Good News (!!!) from the world of TCP Congestion Control
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Google released a patch today that significantly improves how congestion control works in TCP . First, the great part - the changes are on the sender side, and require no co-ordinated changes on the receiver , or the intermediary network . Which is awesome - it means that this can be incrementally deployed purely by updating the network stack at the end-points. Seriously, that is awesome news. This field has been more art than science for the longest time, and despite the plethora of approaches out there , not much has really changed since the days of Reno. Part of the reason for this is the network equivalent of the Heisenberg Uncertainty Principle - where bandwidth and network delay are inextricably linked, and can't be disambiguated. And the problem with that is that it turns out that you really, really want to look at the two independently to find the optimal operating point for a network . Anyhow, Google's new algorithm - c...