This document provides an overview of MongoDB and introduces some key concepts. It discusses MongoDB's document-oriented data model and how it differs from relational databases. It also covers features like dynamic schemas, ad-hoc querying, secondary indexing, replication, sharding, and new features in MongoDB version 2.2 like concurrency improvements, tag-aware sharding, and TTL collections.

1. An Evening With MongoDB

2. An Evening With MongoDB

3. An Intro to MongoDB
ben.becker@10gen.com
Evening with MongoDB Orlando

4. Data model

5. Data model
• Document oriented

6. Data model
• vs Relational

7. Data model
• Relational
Product
_id name created_at

8. Data model
• Relational
Product
_id name created_at
Product_Attribute
_id product_id key val

9. Data model
• Relational
• assembly required
Product
_id name created_at
Product_Attribute
_id product_id key val

10. Data model
• Relational
• assembly required
• app model != storage model

11. Data model
• Document oriented

12. Data model
• Document oriented
• JSON

13. Data model
• Document oriented
• JSON-like

14. Data model
• Document oriented
• JSON-like
• BSON

15. Data model
• Document oriented
• JSON-like
• BSON
• basically typed JSON
• number, string, binary, array, etc

16. Data model
Document oriented
{
_id: ObjectId(“..”),
name: “Panthers T-shirt”,
created_at: ISODate("2012-08-15T15:42:09.195Z")
}

17. Data model
Document oriented
{
_id: ObjectId(“..”),
name: “Panthers T-shirt”,
created_at: ISODate("2012-08-15T15:42:09.195Z"),
props: [{ key: ‘string’, val: anything }]
}

18. Data model
• Document oriented
• Ad-hoc query support

19. Data model
Ad-hoc query support

20. Data model
Ad-hoc query support
• find, findOne

21. Data model
Ad-hoc query support
• find, findOne
• accept a conditions object
• regular expressions
• numbers
• strings
• etc

22. Data model
Ad-hoc query support
• find, findOne
• accept a conditions object
• regular expressions
• numbers
• strings
• etc
• rich operators
• $lt, $gt, $in, $ne, ...

23. Data model
• Document oriented
• Ad-hoc query support
• Secondary indexing

24. Data model
Secondary indexing

25. Data model
Secondary indexing
• ensureIndex()

26. Data model
Secondary indexing
• ensureIndex()
• accepts an object

27. Data model
Secondary indexing
• ensureIndex()
• accepts an object
• options
• unique, sparse, 2d, expiresAfterSeconds

28. Data model: gains

29. Data model: gains
• Dynamic schemas

30. Data model: gains
• Dynamic schemas
• Data modeled directly to app

31. Data model: gains
• Dynamic schemas
• Data modeled directly to app
• Retain ad-hoc queries

32. Data model: gains
• Dynamic schemas
• Data modeled directly to app
• Retain ad-hoc queries
• Retain secondary indexing

33. Data model: gains
• Dynamic schemas
• Data modeled directly to app
• Retain ad-hoc queries
• Retain secondary indexing
• Productivity

34. Data model: losses

35. Data model: losses
• Joins

36. Data model: losses
• Joins
• Multi-collection transactions

37. Data model: losses
• Joins
• Multi-collection transactions
• use document level $atomics

38. Replication

39. Replication
• distribute data across multiple machines

40. Replication
• distribute data across multiple machines
• redundancy

41. Replication
• distribute data across multiple machines
• redundancy
• auto-failover

42. Replication
• read from master or replicas

43. Replication
• read from master or replicas
• all writes go to master

44. Replication
• read from master or replicas
• all writes go to master
• configurable
• getLastError { w: ‘majority’ }

45. Sharding

46. Sharding
• scale horizontally

47. Sharding
• scale horizontally
• range based partition mechanism

48. Sharding
• scale horizontally
• range based partition mechanism
• shard key

49. Sharding
• scale horizontally
• range based partition mechanism
• shard key
• apps talk to shard set-ups the same way

50. MongoDB 2.2 overview
ben.becker@10gen.com
Evening with MongoDB Orlando

51. Mongo 2.2

52. Mongo 2.2
• Concurrency improvements

53. Mongo 2.2
• Concurrency improvements
• db level locking

54. Mongo 2.2
• Concurrency improvements
• db level locking
• improved yielding

55. Mongo 2.2
• Concurrency improvements
• Tag aware sharding

56. Mongo 2.2
• Concurrency improvements
• Tag aware sharding
• TTL collections

57. Mongo 2.2
• Concurrency improvements
• Tag aware sharding
• TTL collections
• ensureIndex({ date: 1 }, { expiresAfterSeconds: 60*15 })
• cannot be compound
• cannot be used on capped collections

58. Mongo 2.2
• Concurrency improvements
• Tag aware sharding
• TTL collections
• Aggregation ...

59. Questions?
http://docs.mongodb.org/manual/release-notes/2.2/
http://docs.mongodb.org/manual/reference/
aggregation/
http://www.mongodb.org/downloads
@mongodb

60. Thank You!
http://docs.mongodb.org/manual/release-notes/2.2/
http://docs.mongodb.org/manual/reference/
aggregation/
http://www.mongodb.org/downloads
@mongodb