A preview of my Mongo Chic

1. Our Adventure With
MongoDB, Rails & Friends
Chicago Ruby
October 2010

2. Ethan Gunderson
http://ethangunderson.com
Twitter & Github: ethangunderson

4. Our Agenda
1) gathers.us
2) Choosing an ODM
3) Data modeling
4) Other fun Mongo events
5) Q & A

5. Manage events

6. Manage your groups
(coming soon)

7. Aggregate your social content
(coming soon)

8. Data needs
High Value Low Value
Groups Social Events
Events
RSVPs

9. Our Agenda
1) gathers.us
2) Choosing an ODM
3) Data modeling
4) Other fun Mongo events
5) Q & A

10. Lotʼs of options for Rails integration
MongoMapper Mongoid
MogoDoc Mongomatic
Candy

11. We chose ...
The strait Mongo Ruby driver!

12. ORMs are worthless if
you donʼt understand
what theyʼre doing.

13. Simple to use

14. Learn your tools

15. We avoided one until it
became too painful not to
use one.

16. In the end, we chose
Mongoid

17. Rails 3 support

18. Nice query syntax

19. Safe mode

20. Master / Slave

21. Our Agenda
1) gathers.us
2) Choosing an ODM
3) Data modeling
4) Other fun Mongo events
5) Q & A

22. Our data model

23. Introducing groups

24. Option 1

25. Option 2

26. YEAH!!!

27. This idea actually sucks

28. Mongoʼs 4MB document limit
Among other things, it keeps
people like us, from doing
things like that.

29. In reality, documents shouldnʼt be
bigger than ~250kb
Inefficient when...
1) updating on the server
2) transferring across the network
3) serializing to and from BSON

30. Option 3
single collection inheritance

31. Mongoid Support

32. Top level objects are still
top level objects

33. Moral of the story is,
data modeling is still hard

34. Our Agenda
1) gathers.us
2) Choosing an ODM
3) Data modeling
4) Other fun Mongo events
5) Q & A

35. ChicagoDB October
October 18th, 6:00pm
Obtiva Studio
http://chicagodb.com
The CTO of 10gen, Eliot Horowitz, will give us an in depth
look at the components that make up MongoDB

36. Mongo Chicago
October 20th, 9am - 6pm
IIT
http://10gen.com/conferences/mongochicago2010
21 presentations by Mongo users and 10gen employees
covering a wide array of topics from Mongo basics to
Sharding architecture.

37. Our Agenda
1) gathers.us
2) Choosing an ODM
3) Data modeling
4) Other fun Mongo events
5) Q & A

38. Q&A
http://spkr8.com/t/4704