We will take an introductory look at CouchDB with a brief review of the NoSQL movement. We will spend most of the time in actual code and examples from real projects and the Futon web interface, giving a better feeling for what's going on. Plenty of time for Q&A.

1. Intro to CouchDB by Sam Bisbee

3. Maintain CouchDB for Debian

4. Sag (CouchDB for PHP) http://www.saggingcouch.com

5. sam@sbisbee.com || @sbisbee

6. Happy Birthday! CouchDB turned 1.0 last week!

8. NoSQL Explained in 1 Word CHOICE

10. But here's some: try { //Get the post (a StdClass)... $post = $this->sag->get('postID')->body; //...update its info... $post->views++; //..and send it back to the couch. return $this->sap->put($post->_id, $post)->body->ok; } catch(SagCouchException $e) { //The requested post doesn't exist - oh no! if($e->getCode() == "404") $e = new Exception("That post doesn't exist."); throw $e; }

12. Availability – it's okay if nodes go down

13. Partition Tolerance – message loss is okay

14. CAP Theorem Credit: CouchDB The Definitive Guide (http://books.couchdb.org)

16. String: “bwah”

17. Int/Float: 3.33

18. Booleans: true

19. Object: { “key”: “value” }

20. Array: [ “element, “element” ]

23. Stores everything in JSON

24. RESTful API over HTTP

25. Query with Map/Reduce in a language of your choice (usually JavaScript)

27. Stored as JSON (a class)

28. No more schemas! YAY!

29. Documents can have attachments

32. R ead GET /databaseName/docID

33. U pdate PUT /databaseName/docID

34. D elete DELETE /databaseName/docID

38. And now, Futon...

40. Map functions create a set of “intermediate” key/value pairs

41. Reduce functions collate those key/value pairs, but are optional

42. [Word count example in Futon]

44. Explicit typing – add a “type” field. Ex., “type”: “webPage” [back to Futon]

45. Example: Blog posts by author

46. Example: Blog posts by date range

48. One write point

49. Can lock databases, tables, and rows

51. Every document has a _rev

52. Think like a banker: treat transACTIONS like independent actions

53. Transactions Posted Amount Account Balance $100 + $100 $200 - $3,000 - $2,800 + $2,800 $0 { “ docType”: “postAmount”, “ account”: “account doc's _id”, “ amount”: 100 }

54. Example: Blog post Comments Don't store in the document!

56. List and Show functions – convert to a different output type (RSS, etc.)

57. couchdb-lucene – use map style functions to populate a lucene feed

58. Example Write Diagram PHP Couch Map input to value objects Validate your value objects React: send to couch, return an error, etc.

59. Example Write Diagram PHP Couch Map input to value objects Validate your value objects React: send to couch, return an error, etc.

60. Couch App Couch http://www.github.com/couchapp/couchapp/ Map input to value objects Validate your value objects React: send to couch, return an error, etc.

61. Replication Master -> Slave Master

62. Replication Master ↔ Master

63. Replication OMG COUCHES!

65. Sharding – hash the document _id's (hexadecimal), and assign nodes to keyspaces

66. Example Cluster Hashes 0 - 7 Hashes 8 - f Request Proxy (logic)

67. Example Cluster Hashes 0 - 7 Hashes 8 - f Request Proxy (logic)

72. Couchio http://www.couch.io

73. CouchDB: The Definitive Guide http://books.couchdb.org/relax

74. couchdb-lucene github.com/rnewson/couchdb-lucene

75. CouchDB Lounge http://tilgovi.github.com/couchdb-lounge