Talk at the 2011 MySQL Conference and Expo on Drizzle to MySQL migration

1. MySQL to Drizzle, stress free migration Andrew Hutchings Software Developer Rackspace [email_address] Http://www.linuxjedi.co.uk/

2. What is Drizzle?

4. Easier for Developers

5. Improved Usability

6. MySQL to Drizzle, stress free migration Picture by K Latham under a CC by NC SA 2.0 license

7. Installing

8. Installing in Ubuntu Natty: sudo apt-get install drizzle Lucid & Maverick: sudo apt-get install python-software-properties sudo apt-add-repository ppa:drizzle-developers/ppa sudo apt-get update sudo apt-get install drizzle (These instructions are also on http://docs.drizzle.org/ )

9. Installing on Fedora Create a /etc/yum.repos.d/drizzle.repo: [drizzle] name=drizzle baseurl=http://rpm.drizzle.org/7-dev/fedora/$releasever/$basearch/ enabled=1 gpgcheck=0 [drizzle-src] name=drizzle-src baseurl=http://rpm.drizzle.org/7-dev/fedora/$releasever/SRPMS enabled=1 Gpgcheck=0 Then: su -c “yum install drizzle7-server drizzle7-client” (These instructions are also on http://docs.drizzle.org/ )

10. Not Supported

12. Triggers

13. Views

14. SET data type

15. Partitions

17. Memory/Heap (as a main table)

18. FULLTEXT indexes

19. DELETE/UPDATE using multiple tables

20. Multiple timezones (only UTC)

21. Cartesian Joins

22. Protocol Picture by Derek Kaczmarczyk under a CC by 2.0 license

23. Protocol Existing Application libmysqlclient Drizzle New Application libdrizzle

24. Settings Picture by Travel Aficionado under a CC by NC 2.0 license

26. Just use --config-dir=/path/to/files

27. By default no configuration is needed

28. Settings Example config file 1: user=test max-heap-table-size=32M

29. Settings Example config file 2: innodb.buffer-pool-size=256M mysql-protocol.max-connection=2000

30. Settings Example config file 3: [innodb] buffer-pool-size=256M [mysql-protocol] max-connections=32

31. Authentication Auth_all Auth_file Auth_http Auth_ldap Auth_pam Auth plugin system

32. Replication Picture by Kristina Alexanderson under a CC by NC SA 2.0 license

33. MySQL Replication Slave Master Binary Log IO thread SQL thread Transaction InnoDB

34. Drizzle Replication Slave Master InnoDB Replication Reader Replication Applier Transaction

35. Drizzle Replication Start Master: $ drizzled --innodb.replication-log Slave config (slave.cfg): master-host=my_host master-port=3306 master-user=my_user master-password=my_password Start Slave: $ drizzled --plugin-add=slave --slave.config-file=/path/to/slave.cfg

36. Drizzle Replication Disabling replication for a database or table: drizzle> create table t2 (a int) replicate=FALSE; Query OK, 0 rows affected (0.087416 sec) drizzle> create database test2 replicate=FALSE; Query OK, 1 row affected (0.280803 sec)

38. TINY/MEDIUM/LONG BLOB/TEXT

39. YEAR

40. SET

41. CHAR/BINARY

42. Schemas – Changed Types Time In MySQL range is -839:59:59 to 838:59:59 In Drizzle range is 00:00:00 to 23:59:59

43. Schemas – Changed Types Date/Datetime First valid date in MySQL 0000-00-00 First valid date in Drizzle 0001-01-01

44. Schemas – Changed Types INT UNSIGNED UNSIGNED is only a constraint in Drizzle For extended values use BIGINT

45. Schemas – Changed Types INT(n) The braces are not used and ignored.

46. Schemas – New Types TIMESTAMP(6) TIMESTAMP(6) stores microseconds drizzle> select now(); +----------------------------+ | now() | +----------------------------+ | 2011-04-14 00:17:14.638962 | +----------------------------+ 1 row in set (0.000396 sec)

47. Schemas – New Types UUID Stores universally unique values drizzle> select * from t1; +------+--------------------------------------+ | a | b | +------+--------------------------------------+ | 1 | 22681f76-41fa-4245-8461-96dba0961675 | +------+--------------------------------------+ 1 row in set (0.000409 sec)

48. Schemas – New Types BOOLEAN Native BOOLEAN, stores in a single bit where engine supports it. drizzle> select * from t1; +------+------+ | a | b | +------+------+ | 1 | TRUE | +------+------+ 1 row in set (0.000408 sec)

50. Divide by zero is an error

51. Not NULL actually means Not NULL

52. Character Sets Drizzle supports 2 character sets: UTF-8 and Binary

53. Information Schema Now follows the SQL standard Everything else is in DATA_DICTIONARY

54. Drizzledump Migration Picture by Gianluca Neri under a CC by NC ND 2.0 license

55. Drizzledump Migration History... August 2010 in Seattle, the Developers meeting

56. Drizzledump Migration Database Are you MySQL? Convert Data Output

57. Drizzledump Migration MySQL drizzledump Drizzle stdout

59. FullText Dropped

60. INT UNSIGNED -> BIGINT

61. TINY/SMALL/MEDIUM INT -> INT

62. TINY/MEDIUM/LONG BLOB -> BLOB

63. TINY/MEDIUM/LONG TEXT -> TEXT

64. YEAR -> INT

65. TIME -> INT

67. DATE/DATETIME DEFAULT 0000-00-00 -> DEFAULT NULL

68. DATE/DATETIME NOT NULL -> NULL

69. DATE/DATETIME 0000-00-00 data -> NULL

70. SET -> TEXT

71. Drizzledump Migration $ drizzledump --all-databases --host=mysql-host --port=3306 --user=mysql-user --password > dumpfile.sql $ drizzledump --all-databases --host=mysql-host --port=3306 --user=mysql-user --password --destination-type=database --desination-host=drizzle-host

72. Drizzledump Migration Mysqldump: CREATE TABLE `t1` ( `a` int(11) NOT NULL AUTO_INCREMENT, `b` char(50) DEFAULT NULL, `c` datetime DEFAULT '0000-00-00 00:00:00', PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; CREATE TABLE `t1` ( `a` INT NOT NULL AUTO_INCREMENT, `b` VARCHAR(50) COLLATE utf8_general_ci DEFAULT NULL, `c` DATETIME DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE='InnoDB' AUTO_INCREMENT=1 COLLATE='utf8_general_ci'; Drizzledump:

73. Drizzledump Migration INSERT INTO `t1` VALUES (1,'Hello','0000-00-00 00:00:00'), (2,'World','2011-04-14 06:50:52'); INSERT INTO `t1` VALUES (1,'Hello',NULL), (2,'World','2011-04-14 06:50:52'); Mysqldump: Drizzledump:

74. My Data is Mangled! Picture by Remi under a CC by NC ND 2.0 license

75. My Data is Mangled! Whilst migrating... 'è' Became 'è'

76. My Data is Mangled! UTF8 Data PHP App MySQL Server UTF8 Table Drizzledump

77. My Data is Mangled! Solution? --my-data-is-mangled Drizzledump doesn't set MySQL connection character set.

79. Change 0000-00-00 to 0001-01-01 in code Clint Byrum from Canonical is working on a plugin for this

80. The Future

81. Drizzledump From File MySQL Server mysqldump MySQL dump file Drizzledump? Drizzle Server Drizzle dump file

82. MySQL to Drizzle Replication Drizzle Server MySQL Server Binlog Reader Transaction Applier

83. Questions? Photo by Ντάνκαν under CC by NA SA 2.0 license

84. Drizzle Developer Day Friday 15 th April 9:30 – 16:00 Hilton Hotel (across the road) Coastal Ballroom