This document discusses MySQL backup strategies. It describes taking both logical backups using mysqldump and physical backups by copying the raw database files. The backup process includes verifying backups, encrypting and compressing them, distributing copies to different locations, restoring from backups, configuring replication from backups, and checking data integrity between servers using checksums. Maintaining binary logs allows restoring to any point in time. The presenter is a MySQL database administrator who manages domain names and takes regular backups to ensure data protection and disaster recovery.

1. MySQL Backup Strategy
@ IEDR
Marcelo Altmann
Oracle Certified Professional, MySQL 5 Database Administrator
Oracle Certified Professional, MySQL 5 Developer
Percona Live London – November 2014

2. Who am I ?
 MySQL Database Administrator @ IE Domain Registry (IEDR)
 Student
 Systems for Internet @ FEEVALE University
 Oracle Certified Professional
 MySQL 5 Database Administrator
 MySQL 5 Developer
 marceloaltmann.com
 @altmannmarcelo

3. What IEDR Does ?
 Manages the official country code top level domain for Ireland - .ie
 Maintain the database of .ie registered domain names
 MySQL 5.6
 Mainly InnoDB
 ~80% reads

4. Backup Introduction – What for ?
 Add new slave to your replication topology
 Reproduce some bug on your labs
 Point-in-time recovery
 Disaster Recovery

5. Backup Introduction - Replication as backup
 Replication is a backup, but not for all scenarios:
 When is replication a backup ?
 Physical file corruption
 Any Master Server component fail ( RAM, Disk, Network, CPU )

6. Backup Introduction – Replication as backup
 Including OS errors

7. Backup Introduction – When Replication doesn’t
works as a backup?
 Application bugs
 Someone hacks into your database server
 Wrong admin commands like DELETE / UPDATE / DROP

8. Backup - Logical
 Logical
 Save information represented as logical structure ( CREATE DATABASE, CREATE
TABLE, INSERT )
 Can be used to restore all databases, single database, single table
 Slower than Physical
 It's taken while MySQL is running
 Done via mysqldump, mydumper, SELECT ... INTO OUTFILE

9. Backup - Physical
 Raw copies of directory and files of database contents (copy of MySQL
datadir)
 No selective restore
 Faster than Logical
 Done via OS copy commands, mysqlbackup, mysqlhotcopy, percona
xtrabackup

10. Backup life cycle
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

11. Backup - Infrastructure

12. Backup - Infrastructure

13. Logical Backup
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

14. Logical Backup
 mysqldump
 Store backup duration
 Backup output of SHOW SLAVE STATUSG
 Verify exit status and last line of the dump

15. Logical Backup – exit status and last line
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

16. Logical Backup – exit status and last line

17. Logical Backup – exit status and last line

18. Logical Backup – Compress and Encrypt
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

19. Logical Backup – Compress and Encrypt
 Change file permissions
 Compress backup to save disk space (GZIP, BZIP2, …)
 Encrypt your backups ( openssl )

20. Logical Backup – Compress and Encrypt

21. Distribute – Same Server
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

22. Distribute – Same Server

23. Distribute – Same DC

24. Distribute – Same Region

25. Distribute

26. Distribute
 Send copy of your backups to different datacenter
 Pay attention on the distance between datacenters – Natural Disasters!
 scp / rsync
 Keep copy for 1 week

27. Restore
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

28. Restore
 Drop everything on MySQL restore instance
 Restore dump
 Check exit status of mysql command

29. Physical Backup – Fast Recovery
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

30. Physical Backup – Fast Recovery
 Stop MySQL
 Compress datadir
 Encrypt file

31. Slave
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

32. Slave

33. Slave
 Configure restore server as slave
 Use --master-data
 Use --relay-log-info-repository=TABLE
 Use Relay_Master_Log_File and Exec_Master_Log_Pos from SHOW SLAVE STATUS
 Use GTID

34. Checksum
Backup
(Logical)
Verify
Encrypt
Distribute
Restore
Checksum
Slave
Backup
(Physical)

35. Checksum
 Verify data integrity between master and slaves
 pt-table-checksum
 Monitor time

36. Backup binlog - Point in time recovery
 mysqlbinlog –-raw –-read-from-remote-server –-stop-never
 Checksum master binlog and backup binlog
 Compress
 Encrypt

37. Audit Copy
 Allows you to restore your database to any point in time
 Grouped by month
 First Logical and Physical backup of each month
 All binary logs

38. Questions?
@altmannmarcelo
marceloaltmann.com