1. Making sense in the brave new world of databases Benoit Grégoire Savoir-faire Linux [email_address]

3. There is this new hype called “NoSql”

4. I don't want to deal with another database holy war for the next ten years of my career. Especially if it will prevent us from using the right tool for the job.

5. Lots of smart people worked on new tools, but fanboys are beginning to strike...

7. There is no criteria 2

9. Are active projects

11. Rumor has is Google has a few PHD on it's payroll

13. I overheard it has a manual, but I didn't actually check since I use an ORM for everything.

16. Transactions

17. Relational integrity and schema enforcement

18. Fast joins WITHOUT instanciating objects

19. Replication (but then you probably chose the wrong solution)

21. Scalable Non Relational Database (SNRD?)

22. The movement formerly known as NoSQL?

23. Databases

25. Most web applications are not

26. Those that are don't have all of their components « Internet scale »

29. Major problem: Availability and replication

30. Major problem: Transactions

32. Consistency

33. Isolation

34. Durability

36. Good – Fast – Cheap

37. For distributed databases

39. Availability

42. Unless maybe...

44. Soft-state

45. Eventually consistent

47. Some of them use another as backend or frontend

49. Active project

50. Databases classification

51. Relational databases

52. Column-oriented databases

53. Key-Value stores

54. Hierarchical Databases

55. Graph databases

56. Document databases

57. Extensible record stores

58. Object databases

60. Comparing curency/locks/transactions Conc Control Data storage Replication Txn Redis Locks RAM Async N Scalaris Locks RAM Sync L Tokyo Locks RAM or disk Async L Voldemort MVCC RAM or BDB Async N SimpleDB None S3 Async N Riak MVCC Pluggable Async N MongoDB Field-level Disk Async N Couch DB MVCC Disk Async N HBase Locks Hadoop Async L HyperTable Locks Files Sync L Cassandra MVCC Disk Async L BigTable Locks + stamps GFS Sync + Async L ScaleDB Locks Disk Sync Y MySQL Cluster Locks Disk or RAM Sync Y MySql MyIsam Locks Disk Async N MySQL InnoDB MVCC Disk Async Y Drizzle Locks Disk Sync Y PostgreSQL MVCC Disk Pluggable Y

62. Are we headed to the one database to rule them all?

64. Don't neglect local caching

65. A database is not something that can be abstracted out.