Quick introduction to MongoDB, a popular document-oriented database, and MongoDB drivers for PHP.

1. MongoDB with PHP James Tang <james@fwso.cn> A quick introduction

2. What is MongoDB

4. Distributed computing

5. Why MongoDB

6. Agility MongoDB simplifies development. Data in MongoDB is stored in JSON-like documents with dynamic schemas( free schema ), providing flexibility during the development process. Requirements changes so frequently

10. How MongoDB works

12. Traversability

13. Performance Reference: http://bsonspec.org/

15. db_name.collection_name called namespace

16. .ns file used to store metadata for namespace.

17. Dbname.0, .1, .2... stores the data

21. 32bit MongoDB server limit to 2G data per mongod instance

22. Wire Protocol Clients use wire protocol to access MongoDB server. Wire Protocol is a TCP/IP socket based lightweight protocol. Reference: http://www.mongodb.org/display/DOCS/Mongo+Wire+Protocol

23. Getting Started

27. use blog

28. db.posts.insert({“title”:”Hello, MongoDB”})

29. db.posts.find()

30. db.posts.remove([criteria])

31. db.posts.drop()

32. ...

34. Or dowload and compile

35. Extenstion address: http://pecl.php.net/package/mongo

37. CRUD

39. Create Collection(table)?

40. Alter Schema? NO

42. Creating

45. $where, array('$where'=>'function(){... return true/false}')

46. Regular expression, array('title'=>'/^Hello/i')

47. Limit/Sort with cursor

49. http://www.mongodb.org/display/DOCS/Advanced+Queries

50. Updating

51. Updating Using updating modifier: $inc, $set, $push, ...

53. Atomically – instead of locking and transactions

55. http://www.mongodb.org/display/DOCS/Updating

56. Upserts Like REPLACE statement in MySQL

58. $collection->drop()

59. Advanced Features

61. Count, distinct, group can be done with it

62. Speed is the cost, not use in “real time”

65. Not only one master

66. mongod --port 27017 --dbpath /data/node1 --replSet cluster/localhost:10001

67. mongod --port 10001 --dbpath /data/node1 --replSet cluster/localhost:27017

68. db.runCommand({“replSetInitiate”:{“_id”:”cluster”, “members”:[{“_id”:1,”host”:”locahost:27017”},...]}})

70. Sharding key, one key of a collection used to split data

71. A shard is can be a single server or a replica set

73. Old document will be replaced if collection if full

77. The End http://fwso.cn