AmebaPico is a social networking game launched in 2010. It uses AWS services like S3, CloudFront, EC2, and MongoDB. The game had 60 million monthly active users at its peak. It was developed using Flash for the front-end and ran on AWS infrastructure with a MongoDB database. Scaling issues arose as traffic grew, which required optimizing the database and EC2 instance configurations.

1. AmebaPico
AWS

3. • (29)
• @kohei_april20
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SocialApps
•
pico facebook

4. • AmebaPico
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• AWS
• MongoDB

5. AmebaPico

6. AmebaPico
• 2010 3
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• facebook mochimedia
(pico.ameba.net)

8. • 390
• MAU60
• 10 /20
• 3:7
facebook
•
2011 5

10. HTTP
swf web Lock
(ZooKeeper)
web
ID
(memcached)
Flash
Socket
DB
(MongoDB)
CDN
amazon (CloudFront) (S3)
(ElasticMapReduce)
LB Haproxy

11. AWS
• AWS
• S3
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• CloudFront CDN
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• ElasticMapreduce
• S3
• EC2
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• EBS
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12. EC2
→ →web
→socket ,MongoDB →MongoDB

13. Socket
• I/O
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14. ID
• UID( ID)
• UID ID
facebook connect
facebook
mochimedia
UID:××× ←→ facebookID:○ ○ ○ ○ ○ ○
UID:○○○ ←→ amebaID:××××

15. Point
ID
UID
ID
UID
TxID
TxID

16. DB
•
KeyValue
• DB
• DB
MongoDB

17. MongoDB
※
EBS
※
(on EBS)

18. Flash
main.swf
shop.swf
load
room.swf
profile.swf
main
…
<<interface>>
ShopDelegate
onBuy(...)
MainShopDelegate MockShopDelegate
flash onBuy(...) onBuy(...)

20. EC2

21. EC2
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22. EC2
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• 60
• 2 3 1
• 4 4
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23. EC2
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• IP
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24. EC2
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25. MongoDB

26. MongoDB
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Socket read write
Chat 1200/s /s
Info 4000/s /s
76
300
2.5
50GB

27. MongoDB
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• com.mongodb.DBPortPool$SemaphoresOut: Out
of semaphores to get db connection
• MongoDB I/O
• 2 4→6
• I/O EC2
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•

28. MongoDB
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29. MongoDB
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30. • MongoDB
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31. • AmebaPico
• http://pico.ameba.net
• http://apps.facebook.com/amebapico/
• http://www.mochigames.com/games/pico/
•
• morino_kouhei@cyberagent.co.jp
• @kohei_april20