Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/1MvLQjT. Niklas Gustavsson goes into detail on how a Spotify service works and how the UNIX philosophy of composing components that does a single thing well, works on a greater scale. He presents how services are built in two distinct layers and common patterns for, for example, service discovery and storage. Filmed at qconlondon.com. Niklas Gustavsson is a backend engineer at Spotify, open source hacker, mountain biker and father of two awesome kids. At Spotify, he mostly works on the audio pipeline and content delivery.

1. Audio&delivery&at&scale
Niklas'Gustavsson'
'ngn@spo1fy.com'
'@protocol7

2. InfoQ.com: News & Community Site
• 750,000 unique visitors/month
• Published in 4 languages (English, Chinese, Japanese and Brazilian
Portuguese)
• Post content from our QCon conferences
• News 15-20 / week
• Articles 3-4 / week
• Presentations (videos) 12-15 / week
• Interviews 2-3 / week
• Books 1 / month
Watch the video with slide
synchronization on InfoQ.com!
http://www.infoq.com/presentations
/spotify-audio-scale

3. Presented at QCon London
www.qconlondon.com
Purpose of QCon
- to empower software development by facilitating the spread of
knowledge and innovation
Strategy
- practitioner-driven conference designed for YOU: influencers of
change and innovation in your teams
- speakers and topics driving the evolution and innovation
- connecting and catalyzing the influencers and innovators
Highlights
- attended by more than 12,000 delegates since 2007
- held in 9 cities worldwide

4. Playing(
(music

5. "Microservices"

6. Simplicity
Robustness

7. Scalability

8. "Developers*should*build*a*program*out*of*simple*parts*connected*
by*well*defined*interfaces,*so*problems*are*local,*and*parts*of*the*
program*can*be*replaced*in*future*versions*to*support*new*
features.*This*rule*aims*to*save*=me*on*debugging*complex*code*
that*is*complex,*long,*and*unreadable"
—"Eric"S."Raymond,"The"Art"of"Unix"Programming

9. Embrace(Conway's(law2
2
"h$ps://labs.spo.fy.com/2014/03/27/spo.fy8engineering8culture8part81/

10. What's'a'service?

11. Let's&walk&a&request

12. Perimeter'services

14. View%services

15. Service'discovery

16. $ dig _spotify-search._hm.lon3.spotify.net SRV
...
5000 5000 8181 lon3-search-a1.lon3.spotify.net.
5000 5000 8181 lon3-search-a2.lon3.spotify.net.
...

17. Data$services

18. Aggregra&on

19. Scaling(out

20. Mul$site

21. c/1.44

22. Content&distribu-on

23. Audio&data

24. Produc'on)storage

25. CDNs

28. Head%files

30. Prefetching

31. Ques%ons?
ngn@spo'fy.com-
-@protocol7

32. Watch the video with slide synchronization on
InfoQ.com!
http://www.infoq.com/presentations/spotify-
audio-scale