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Netflix Content Delivery UKNOF – Q1 2012 1
Netflix Content Delivery UKNOF – Q1 2012
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Netflix - Unlimited films & TV episodes for £ 5.99 per month
2
Netflix Share of US ISP Traffic
Source: Sandvine Global Internet Phenomena Report – Spring 2011
Netflix International Expansion
§ Canada Autumn 2010
§ 43 Countries in Latin America Autumn 2011
§ UK/Ireland last week
Virgin 32%
BT 21%
BSkyB 19%
TalkTalk 13%
O2 6%
PlusNet 2%
Other 8%
Share of Traffic Across UK Service Providers
1,200
1,400
1,600
1,800
2,000
2,200
2,400
2,600
kilobits per se
cond
NeFlix Performance on Top Networks -‐ USA
ATT -‐ DSL ATT -‐ FTTx CableOne -‐ Cable CableVision -‐ Cable CenturyLink -‐ DSL
Charter -‐ Cable Clearwire -‐ Mobile Comcast -‐ Cable Cox -‐ Cable FronHer -‐ DSL
Suddenlink -‐ Cable TWC -‐ Cable Verizon -‐ DSL Verizon -‐ FTTx Windstream -‐ DSL
1,200
1,400
1,600
1,800
2,000
2,200
2,400
2,600
1/9/12 1/10/12 1/11/12 1/12/12 1/13/12 1/14/12 1/15/12 1/16/12 1/17/12 1/18/12
kilobits per se
cond
NeFlix Performance on UK Networks
BSkyB BT O2 PlusNet TalkTalk Virgin
From 0 to 10’s of Gbps in 10 days
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Currently Using Top Three Global CDNs
§ Akamai
§ Level3
§ Limelight
§ Traffic share directed by client-measured network performance and commercial considerations
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Netflix-Developed Adaptive Client
§ All content delivered via HTTP
§ Clients actively measure network performance to select bitrate and CDN § Stream start § During playback
§ Very large library of catalog titles
§ Wide distribution of viewing across the entire library driven by highly personalized recommendation engine
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Helping Service Providers Scale Netflix Delivery
§ Performance statistics
§ Traffic forecast under mutual NDA
§ Embedded caching with larger providers (>5 Gbps)
§ Peering for smaller providers (<5 Gbps)
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The Netflix Cache
§ Serve >80% of Netflix traffic from the local ISP datacenter § Saves on transit, transport and other upstream scaling costs
§ ISP provides rack space, power, 10 Gbps optical port(s)
§ Used exclusively for Netflix content
§ Completely integrated with the Netflix content delivery system
§ Fill content outside peak times
Directing Clients to Caches
Netflix Control Servers Broadband ISP
3. Client connects to local cache
4. Local cache delivers video stream
• User routing is done by Netflix control servers, not dependent on client DNS configuration
• Request is routed to the nearest available cache
• Working sets of popular content deliver up to >80% network offload
Netflix Cache
• Space optimized: 4U high-density storage
• Power optimized for low power/cooling requirements (≅500W)
• 10GE optical network interfaces
• FreeBSD
• nginx high-performance web server
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Cache Hardware & Software
Network Planning and Failover
§ Uses BGP to associate client networks to caches
§ Uses BGP MEDs to create hierarchy giving service providers control over traffic
§ Typical configuration includes N+1 redundancy
§ Cache requires no field service
![Paper survey€¦ · Paper survey [1] Unreeling Netflix: Understanding and Improving M ulti-CDN Movie Delivery, IEEE Infocom 2012 [2] Algorithmic Nuggets in Content Delivery, ACM](https://static.documents.pub/doc/80x56/60545a440a6cb40dc14de501/paper-survey-paper-survey-1-unreeling-netflix-understanding-and-improving-m-ulti-cdn.jpg)
