Database backup, migration

08.14 self-summary

Backup of the database

A backup of the database

1. Single database backup

mysqldump -uroot -p123 db1 > db1.sql  #库名
mysqldump -uroot -p123 db1 table1 table2 > db1-table1-table2.sql #库名 表名

2. Multi-database backup

mysqldump -uroot -p123 --databases db1 db2 mysql db3 > db1_db2_mysql_db3.sql

3. Back up all libraries

mysqldump -uroot -p123 --all-databases > all.sql

II. Backup Recovery

1. Quit database

mysql -u -p < filename.sql;

2. Within the database

• Create an empty database
• Select Database
• Then source filename; to restore

E.g

use db1;
source /root/db1.sql

III. Database Migration

务必保证在相同版本之间迁移
# mysqldump -h 源IP -uroot -p123 --databases db1 | mysql -h 目标IP -uroot -p456

IV. Backup higher order

1. Common parameters

• -B: it is represented specify multiple libraries, an increase of building a database statements and statements use the database.
• -compact: uncommented for debug output is not suitable for use in a production environment.
• -A: it represents the duty of all the libraries.
• -F: Refresh binlog log, facilitate incremental recovery.
• -master-data: increase binlog log file name and location corresponding to the point.
• -x, -lock-all-tables: Table were locked at the time of the backup, maintaining data consistency.
• -d: only backup structure of the table.
• -t: back up only the data in the database
• -single-transaction for backup innodb database.

2.-B backup

Single Library

备份test中的所有表
mysqldump -uroot -ppassword  -B test >/tmp/test.sql

Multi-database

mysqldump -uroot -ppassword  -B 库1 库2  >/tmp/test.sql

3. gzip compressed data backup

mysqldump -uroot -ppassword  -B 库1 库2 |gzip >/tmp/test.gz

Cutting binlog log :( 4. incremental backups when the backup time can be used)

-F 的作用就是备份数据库的时候，将binlog日志进行重新刷新。
mysqldump -uroot -ppassword  -t  -B -F test

5. Back up time will be recorded and mysqlbinglog location specified file file name

--master-data=1 的作用就是备份数据库的时候，将binlog日志进行重新刷新
mysqldump -uroot -ppassword  -t  -B -F --master-data test