Technical Challenges of Developing a Facebook Game

•

3 likes•1,834 views

Patrick Huesler

Talk given at http://webilea.ch/

Technology

Technical Challenges of
Developing a Facebook
Game
webilea Basel, 26-01-2011

Who?
• Patrick Hüsler / @phuesler
• huesler-informatik.ch
• Freelance developer
• backend developer at ....

Game Developers
• Zynga (54 games)
• EA (35 games)
• Pop Cap (2 games)
• Crowd Star (20 games)
• Digital Chocolate (13 games)
• Playdom (39 games)

Sandbox
• iframe inside Facebook
• ﬂash client (javascript based games
are still a minority)
• backend
• Facebook API (FBML, graph,
connect, payment ...)

Roughly estimated
requirements
• ~ 20’000 concurrent users
• ~ 4’000 rps
• ~ 60’000 DB queries/s
• DB write heavy ~ 50/50
• Deliver plenty of assets (ﬂash ﬁles,
images etc.)

Status Quo (Peak)

• ~ 200’000 DAU
• ~ 3’000 concurrent users
• ~ 660 rps peak traﬃc
• ~ 7000 DB queries/s
• 15 ms average response time

Dedicated hardware

• small number of machines
• fast CPU’s
• fast disks
• fast network

Monitoring
• Availability monitoring with
pingdom (pingdom.com)
• Scout for hardware metrics and
usage data (scoutapp.com)
• New Relic for applications
(newrelic.com)

Database: Redis
• very fast
• powerful data structures
• good ﬁt to store diﬀerent types of
data
• supports virtual memory

Data format
• One Redis hash table per user
• Keys store JSON
• Custom built data mapper called
Remodel

Durability: Flat files
• Asynchronously written to disk
• Replicated on ﬁle system

Links
•wooga.com/jobs
•newrelic.com
•scoutapp.com
•pingdom.com
•huesler-informatik.ch

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Technical Challenges of Developing a Facebook Game

1. Technical Challenges of Developing a Facebook Game webilea Basel, 26-01-2011

2. Who? • Patrick Hüsler / @phuesler • huesler-informatik.ch • Freelance developer • backend developer at ....

4. Players in Facebook Game Market

5. Game Developers • Zynga (54 games) • EA (35 games) • Pop Cap (2 games) • Crowd Star (20 games) • Digital Chocolate (13 games) • Playdom (39 games)

6. Anatomy of a Facebook game

7. Sandbox • iframe inside Facebook • ﬂash client (javascript based games are still a minority) • backend • Facebook API (FBML, graph, connect, payment ...)

8. Facebook Game Lingo

9. Monthly Active Users (MAU)

10. Current MAU Leader

11. City Ville ~ 100 Million MAU

12. Daily Active Users (DAU)

13. Current DAU Leader

14. City Ville ~ 20 Million DAU

15. check http://appdata.com

16. Challenges

17. Goal: ~ 1’000’000 DAU

18. 2 People for:

19. Backend Development

20. Operations

21. 24/7

22. Cent/DAU (should be low)

23. Rapid Growth

24. Ever changing Facebook APIs

25. Roughly estimated requirements • ~ 20’000 concurrent users • ~ 4’000 rps • ~ 60’000 DB queries/s • DB write heavy ~ 50/50 • Deliver plenty of assets (ﬂash ﬁles, images etc.)

26. Our Architecture

27. Status Quo (Peak) • ~ 200’000 DAU • ~ 3’000 concurrent users • ~ 660 rps peak traﬃc • ~ 7000 DB queries/s • 15 ms average response time

28. Dedicated hardware • small number of machines • fast CPU’s • fast disks • fast network

29. Automate, automate, automate!!!!!!!

30. Monitoring • Availability monitoring with pingdom (pingdom.com) • Scout for hardware metrics and usage data (scoutapp.com) • New Relic for applications (newrelic.com)

31. CDN to deliver assets

32. Rails Application

33. Yes, really!

34. Database: Redis • very fast • powerful data structures • good ﬁt to store diﬀerent types of data • supports virtual memory

35. Data format • One Redis hash table per user • Keys store JSON • Custom built data mapper called Remodel

36. Durability: Flat files • Asynchronously written to disk • Replicated on ﬁle system

37. Q&A

38. Links •wooga.com/jobs •newrelic.com •scoutapp.com •pingdom.com •huesler-informatik.ch

39. One last thing

40. euruko2011.org