QUIC: in Theory and Practiceinternetonmars.org/deltav.pdf · Spongebob style.css Lorem ipsum dolor...
Transcript of QUIC: in Theory and Practiceinternetonmars.org/deltav.pdf · Spongebob style.css Lorem ipsum dolor...
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QUIC:in Theoryand Practice
Robin Marx - PhD researcher - @programmingart internetonmars.org/deltav.pdf
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Q uick
U DPI nternetC onnections
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Qa uaman
Ubr Ce wayne
IThe fastest man al ve
C ombined
Meanwhile...
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PhysicalData-Linknetwork
TransportSECURITY
APPLICATION
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5-6
7
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PhysicalData-Linknetwork
TransportSECURITY
APPLICATION
1
2
3
4
5-6
7
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PhysicalData-Linknetwork
TransportSECURITY
APPLICATION
1
2
3
4
5-6
7
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PhysicalData-Linknetwork
TransportSECURITY
APPLICATION
1
2
3
4
5-6
7
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TCP SYN/ACK
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TCP SYN/ACK
TLS CERTIFICATE
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TCP SYN/ACK
TLS CERTIFICATE
TLS CIPHER
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TCP SYN/ACK
TLS CERTIFICATE
TLS CIPHER
HTTP GET
1 roundtrip = 125ms
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Wanda
Poker
spongebob
index.html
main.js
style.css
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Wanda
Poker
spongebob
index.html
main.js
style.css
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Wanda
Poker
spongebob
index.html
main.js
style.css
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Wanda
Poker
spongebob
index.html
main.js
style.css
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Wanda
Poker
spongebob
index.html
main.js
style.css
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Wanda
Poker
spongebob
index.html
main.js
style.css
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TCPHead-of-line
blocking
Wanda
Poker
spongebob
index.html
main.js
style.css
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HTTPHead-of-line
blocking
Wanda
Poker
spongebob
index.html
main.js
style.css
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HTTPHead-of-line
blocking
Wanda
Poker
spongebob
index.html
main.js
style.css
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HTTPHead-of-line
blocking
Wanda
Poker
spongebob
index.html
main.js
style.css
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HTTPHead-of-line
blocking
Wanda
Poker
spongebob
index.html
main.js
style.css
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1
2
3
4
5
6
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1
2
3
4
5
6
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Problems THREE
1. 4-RTT connection setup
2. TCP head-of-line blocking
3. HTTP head-of-line blockingParallel connections}
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TLS 1.2
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TLS 1.2 resumptionTLS 1.3
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TLS 1.2 resumptionTLS 1.3
TCP fast open
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TLS 1.2 resumptionTLS 1.3
TCP fast open TLS 1.3 resumption
0 - RTT
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1.2 1.3 TLS
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1.1 HTTP
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1.1 2 HTTP
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Lorem ipsum dolor sit amet, consectetur adipiscing
elit. In sed velit urna. Vivamus lectus est, facilisis in
imperdiet nec, tempus quis turpis. Morbi posuere leo
sit amet mi mattis, sed sollicitudin diam porttitor.
Curabitur sed orci urna. Donec tincidunt ligula eget
eros rhoncus, a maximus erat fermentum. Curabitur
pharetra tempus ante non aliquet. Nulla efficitur
metus vulputate felis suscipit, in hendrerit ipsum
venenatis. Praesent ut nunc facilisis, convallis lacus
eu, egestas ante.
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Spongebob style.css Lorem ipsum dolor sit amet, consectetur adipiscing
elit. In sed velit urna. Vivamus lectus est, facilisis in
imperdiet nec, tempus quis turpis. Morbi posuere leo
sit amet mi mattis, sed sollicitudin diam porttitor.
Curabitur sed orci urna. Donec tincidunt ligula eget
eros rhoncus, a maximus erat fermentum. Curabitur
pharetra tempus ante non aliquet. Nulla efficitur
metus vulputate felis suscipit, in hendrerit ipsum
venenatis. Praesent ut nunc facilisis, convallis lacus
eu, egestas ante.
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TCP
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TCP
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TCP
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䷝
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䷝
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TCP UDP
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IPTCP
TLS 1.3HTTP/2
QUIC
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IPTCP
TLS 1.3HTTP/2
QUIC
UDP
HTTP/2 over quic
TLS 1.3 Q U IC
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IPTCP
TLS 1.3HTTP/2
QUIC
UDP
HTTP/2 over quic
TLS 1.3 Q U IC
QUIC- Steals Multiplexing from HTTP/2
- Re-implements In-order Reliability on top of UDP
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IPTCP
TLS 1.3HTTP/2
QUIC
UDP
HTTP/2 over quic
TLS 1.3 Q U IC
QUIC- Steals Multiplexing from HTTP/2
- Re-implements In-order Reliability on top of UDP
= Per-resource reliabilityOn a single connection
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The mother of all protocols1. ++Security
2. Prevent middlebox meddlingthrough encryption
3. ConnectionID and Multipath
4. Forward Error Correction, Header compression, ....
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CustomCongestionControl
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CustomCongestionControl
Netinfo APIwicg.github.io/netinfo
+
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WE
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gQUIC>7% of global traffic
Battle-tested (but only by Google)
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gQUIC>7% of global traffic
Battle-tested (but only by Google)
iQUIC0% of global traffic
14 implementationsNot integrated into browser
V1 POC by end of 2018https://github.com/rmarx/quickerhttps://github.com/quicwg/base-drafts/wiki/Implementations
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8% on desktopOn average
3.6% on mobileOn average
Langley et al., The QUIC Transport Protocol: Design and Internet-Scale Deployment, 2017
Latency reduction
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8% on desktopOn average
16 - 14% 99th percentile
3.6% on mobileOn average
Langley et al., The QUIC Transport Protocol: Design and Internet-Scale Deployment, 2017
Latency reduction
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88% on desktop
68% on mobile
Langley et al., The QUIC Transport Protocol: Design and Internet-Scale Deployment, 2017
0-RTT success rate
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QUIC is better than TCP, HTTP/2 (and 1.1) (on lossy networks)
Langley et al., The QUIC Transport Protocol: Design and Internet-Scale Deployment, 2017Cook et al., QUIC: Better for What and for Whom?, 2017
Megyesi et al., How quick is QUIC?, 2016
14% faster than TCP (H1.1 and H2) on 4G
20% slower with loss vs TCP H1.1 100% and H2 >200%
20% less rebuffering for YouTube in India
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Is QUIC really better than TCP, HTTP/2 (and 1.1) ?
Bhat et al., Not so QUIC: A Performance Study of DASH over QUIC, 2017Kakhki et al., Taking a Long Look at QUIC, 2017
Carlucci et al., HTTP over UDP: an Experimental Investigation of QUIC, 2015
100% slower than TCP if packet re-ordering
Up to 75% less Mbps than TCP for DASH streaming
30% slower than TCP H1.1 on fast lossy network
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QUIC costs
≈2x CPU Compared to TCP/TLS
Langley et al., The QUIC Transp t Protocol: Design and Internet-Scale Deployment, 2017
Userspaceoverhead
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58% of time
CPU, not networkWas slowdown cause
On mobile
Kakhki et al., Taking a Long Look at QUIC, 2017
Userspaceoverhead
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QUIC: The mother of all protocols
1. TCP -> UDP
2. Security, performance and evolvability
3. Better overall, but especially for lossy networks
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Predicting the future
1. Move to HTTP/2 (or at least HTTPS)
2. Just flip the switch™ (2019-2020)
3. Prepare to use tweak-tools (push + congestion control)
https://github.com/quicwg
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