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Cloudflare Talks Up Multi-Path TCP But Dings Linux's Less Than Ideal Support
The folks at Cloudflare have published another great engineering blog post with this time covering Multi-Path TCP (MPTCP) as a very interesting addition to the TCP spec
This is excellent in theory for allowing greater throughput and redundancy especially for mobile phones having both a cellular data connection and WiFi or servers sporting multiple wired network interfaces, but in practice it's still not a fully-baked solution. Don't get me wrong, Linux developers did tremendous work to get where we are, but, in my opinion for any serious out-of-the-box use case, we're not there yet. I'm optimistic that Linux can develop a good MPTCP client story relatively soon, and the possibility of implementing the Path manager and Scheduler in BPF is really enticing.
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