1. Continual opening of
Second Life
Phoenix Linden (Aaron Brashears)
Director, Studio DaBoom!
Rob Linden (Rob Lanphier)
Open Source Busybody
Linden Lab
1

2. What is Second Life
2

3. It’s a Virtual World
(not a game)
← World
← Game
3

4. Collaborative Palette
for Content Creation
4

5. It’s Big
5

6. It’s Big
5

7. and Growing
LindeX
Concurrent
GDP
Land
100 million SQL queries per day
~50 terabytes of user-created data
10 gbits/second peak bandwidth
1 petabyte of total traffic/month
6

8. and Growing
LindeX
Concurrent
GDP
Land
2003
2004
2005
100 million SQL queries per day 2006
2007
~50 terabytes of user-created data
10 gbits/second peak bandwidth
1 petabyte of total traffic/month
6

9. Ordinary People
7

10. A Lot!
8

11. A Lot!
• 8,300,000 registered accounts
• 500,000 active residents
• 800,000 distinct items
exchanged
• 26 million p2p transactions
• US$40 million GDP
• US$7 million exchanged/month
8

12. Even More
• 669,921 hours use/day
• 20% of time spent creating
• Millions of LOC/week
• 76 user-years per day
• 117,236 person content team
• US$11.7 billion/year
9

13. Even More
• 669,921 hours use/day
• 20% of time spent creating
• Millions of LOC/week
• 76 user-years per day
• 117,236 person content team
• US$11.7 billion/year
9

14. • Anshe Chung - Land Developer
10

15. All just geeks?
11

16. All just geeks?
• Nearly gender balanced usage, Median age of 34
11

17. All just geeks?
• Nearly gender balanced usage, Median age of 34
• More use the older you are
& at any age by women
11

18. All just geeks?
• Nearly gender balanced usage, Median age of 34
• More use the older you are
& at any age by women
• 65% international (and growing)
11

19. Open Source
• Released viewer source
code January, 2007
• Thousands of source
downloads, with many
mirrors
• 514 subscribers to open
source mailing list
• 135 patches accepted from
47 outside contributors
12

20. Open the server?
13

21. Current Architecture
14

22. Simple Plan
15

23. …and Global Data
16

24. …and Permanence
17

25. …and Communications
18

26. …and again
19

27. …until we get
20

28. Some Hot Spots
• C++
• Message Template
• Group IMs
21

29. Some Bad Ideas
• C++ CGI/Apache
• Global Identifier
22

30. Some Scale Issues
• Message
Routing
• Neighbor
Management
• Miscellaneous
Cruft
23

31. Some Band-Aids
• Interface to Databases
• Various other glue logic
24

32. 25