AWS Customer Presentation - Justin.tv

Justin.tv and AWS
Kyle Vogt - VP of Engineering

Brief Intro
Justin’s 24/7 “Lifecast” starts March 2007
Live Flash video and interactive chat
Network for cool live broadcasts
Hot-shot Hot
Everything recorded and browse-able

Police Raid Prank Hands up! SF Police! Who was stabbed?

Justin.tv (the business)
VC funded in July
6M hits / month
300 broadcasters
7 full-time employees
Lots of AWS

Growing quickly... Page views up 300% in a month.

Architecture
Phase I - March 2007
Vitalstream CDN running FMS
1 broadcaster (Justin)
Adequate capacity
Expensive. 60% of connections failed!

Architecture
Phase II - May 2007
Stream splitter + Wowza
1 broadcaster (Justin)
1,000 streams
Servers crashed every 2 hours! Limited capacity.

Architecture
Phase III - July 2007
Python Media Server
1,000 broadcasters
100,000 streams
More sleep for me. Reliable and scalable.

AWS By the Numbers 3,170,680 minutes of archived video 50 GB new archive video / day 250 mbps average live bandwidth 1,700 mbps peak live bandwidth 10 to 100 EC2 instances

Financial Comparison 125kbps video stream Provider Cost per user / hour Incremental Savings Time Investment Hardware Cost CDN $0.135 n/a Very Little None Amazon Web Services $0.0074 18x Some None Datacenter $0.0017 4x Lots $$$$$

Bad things
Temptation to de-scale to save a buck
DB and Memcached outside EC2
Using S3 where a CDN is better
... not much else

Good things
Scaling your website in seconds
Serving big objects from EC2 / S3
Using source control and deployment tools
Thinking about scaling ahead of time
Letting Amazon do the hard work

Thanks.

AWS Customer Presentation - Justin.tv

by Amazon Web Services

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