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Confessions of a relational addict
- 1. Confessions of a relational addict Chandra Patni
- 3. Architecture
- 4. http://www.seas.upenn.edu/~zives/03f/cis550/codd.pdf Volume 13 / Number 6 / June 1970 Volume 13 / Number 6 / June 1970
- 5. Promise of ACID Atomicity Consistency Isolation Durability
- 6. READ COMMITTED may block
- 7. ANSI/ISO SQL... READ UNCOMMITTED to allow for non-blocking reads
- 8. But allowed dirty reads...
- 10. Locking Lock Escalation Read Lock Write Lock Table Lock
- 11. MVCC For transactional memory
- 12. Readers don’t block readers Readers don’t block writers Writers don’t block writers Writers block writers (serialized)
- 13. Living in a bliss
- 14. Until...
- 15. need redundancy
- 16. scale reads
- 17. scale writes
- 18. horizontally
- 19. Solutions...
- 20. replication to scale reads
- 22. expensive solution for redundancy
- 23. mongodb
- 24. Distributed database from ground up
- 25. replication in a minute (HA)
- 26. built-in cache through writes
- 27. replicate if you care about your data
- 29. Effective Design
- 30. Domain objects rarely fit in a table row
- 33. join to assemble domain objects
- 34. mongo documents as pre-assembled domain objects
- 35. in place updates ($set, $push)
- 36. New hotness
- 37. Multikeys
- 38. Map reduce map = function () { for (var i = 0; i < this.tags.length; i++) { emit(this.tags[i], this.state == "published" ? 1 : 0); } } reduce = function (key, values) { var total = 0; for (var i = 0; i < values.length; i++) { total += values[i]; } return total; }
- 40. Geospatial
- 41. GridFS
- 42. Rubber meets the road
- 44. Realtime Dashboard Realtime stats for 1 sec, 5 secs, 15 secs 4K updates per second pywebsocket
- 45. IGN Media: Editorial Generated Content
- 46. Content in Mongodb Master/slave over filer for instant backups 100 ops Ruby on Rails backend MongoMapper Integrate Solr Search with MongoMapper: http://github.com/tsxn26/customized-mongomapper-search XML/JSON serialization: http://github.com/rubyorchard/mongomapper
- 48. RESTful API
- 49. Game Schema Design Rapid Schema Revision Optimize canonical use-case
- 50. IGN Social: User Generated Content Manish Pandit
- 51. Activity Streams 3M documents @10-15 qps, @5 updates/sec Moving to activity propagation: 4 documents for every user, i.e. a total of 2M documents with arrays of 500 activities each Move to replica sets on 1.7
- 52. Meta+Level Games
- 53. Shadelight Data in MongoDB and Redis Replicated in real-time to slave servers Master and slave are in different colo Ben Myles wrote awesome library called MongoMatic http://mongomatic.com /
- 54. Mongomatic Ruby datamapper for MongoDB Simple and embraces MongoDB Shadelight and Mongo Machine ( http://mongomachine.com/ ) use it
- 55. We’re hiring http://corp.ign.com / http://labs.ign.com /