This document discusses using mydumper and myloader tools to perform faster logical backups and restores of MySQL databases. Mydumper is an open source backup tool that can backup databases in parallel threads, split output into multiple files, compress files, and support selective backups of databases and tables. It has advantages over the built-in mysqldump such as being multithreaded, supporting compression, and ability to chunk output. The document provides details on mydumper features, options, and examples of using it for full and partial backups. It also introduces myloader for restoring mydumper backups and provides an example restore command.

1. Faster Logical Backup and Restores Using
mydumper
By
MySQL Consulting
Team

2. About MyDBOPS
• MySQL Consulting.
• MySQL Support.
• Remote DBA Service.
• Expert MySQL Solutions
• MariaDB, Percona, Galera, TokuDB are
supported too.

3. Agenda
• Logical Backups
• Backup Tools available
• Drawbacks
• Mydumper
• Myloader

4. Logical backups
• Plain text files - SQL Statements
• Can be remote
• Can be restored on different versions
• Sometimes is the only option
• Partial backup and restores
• Feed ETL processes

5. Backup Tools
mysqldump
• Native MySQL Client Program
• Can be piped to mysql client
• One Big Output File
• Lack of features for modern day problems

6. Drawbacks
• Single Threaded
• Lack of native compression
• Not possible to chunk the output file
• Consistent Online backup

7. mydumper
Maintained by Percona Currently
Launchpad Project
https://launchpad.net/mydumper
Release Notes
http://tinyurl.com/mydumper-091

8. mydumper - features
• Faster as is multithread
• Different files per table
• One row per line
• Can able to chunk based on rows, size
• Support to MariDB multi source replication
• TokuDB transactional support

9. mydumper - important options
• --threads
• --outputdir
• --rows, --chunk-filesize
• --compress
• --less-locking
• --kill-long-queries

10. mydumper - selective backups
• -B, --database
• -T, --tables-list
• -B db1
• -B db1 -T t1,t2
• -T db1.t1,db2.t1
• --regex=‘^((db1.|db2.))’

11. mydumper - improving times
--rows
• Chunk tables by rows
• Only works with INT fields indexes
--file-size-chunks
• Chunk tables by data size
• 1 dump thread but different files allowing parallel
restore
• works with any table

12. mydumper - improving times

13. mydumper - improving times

14. Myloader
• Helps in restoring the backup for mydumper.
Restore
myloader -h x.x.x.x -d /backup/dir -o

15. Examples
• Full backup
mydumper -h x.x.x.x -–less-locking –-compress
-o /backup/dir
• Restore
myloader -h x.x.x.x -d /backup/dir -o

16. Examples
• Partial restore (version >= 0.9)
myloader -h x.x.x.x -d /backup/dir/restore/ -o
-B db
• Partial restore diff DB name (version >= 0.9)
myloader -h x.x.x.x -d /backup/dir/restore/ -o
-B db_new -s db

17. DEMO

18. How MyDBOPS can Help You ?
• MySQL Consulting
• MySQL Support
• Remote DBA services
• 24*7 MySQL Monitoring
Contact : mysqlsupport@mydbops.com

19. Thank You