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One of the major downsides to UDP is that it lacks any form of congestion control, so it's hard to justify QUIC's behaviour due to what it's built atop :) Mean
by _wmd 9y ago
One of the major downsides to UDP is that it lacks any form of congestion control, so it's hard to justify QUIC's behaviour due to what it's built atop :)
Meanwhile we're not talking about a small slice of bandwidth spent on SIP video calls playing unfairly, we're talking about 70% or more of all Internet traffic suddenly stampeding over every pre-existing protocol, they're the floodgates I'm worried about
- trevyn 9y agoIf this was actually a problem, it would be trivial for network operators to prioritize TCP packets over UDP packets. QUIC builds modern congestion control on top of UDP.
- solotronics 9y agoI think the problem is that currently there is no prioritizing within IP traffic and possibly this would cause TCP to suck while QUIC over UDP ran fine. This is just a guess based on how TCP congestion and sliding window work and I am very curious to see how these two interact at various percentages in the wild. If anyone knows how to simulate QUIC on Spirent or Ixia test gear please drop me a line and I will lab this up.
- fulafel 9y agoWe really don't want the prioritisation smarts in the network - End-to-end architecture of the internet, network neutrality and all that.
- IgorPartola 9y agoInternet traffic or web traffic? Last I saw, Netflix and streaming video were the biggest slices of the pie.
- vvanders 9y agoMy understanding is that most of that traffic is on the last mile due to them colocating the data at the ISP level[1]. [1] https://openconnect.netflix.com/en/ https://openconnect.netflix.com/en/