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This article mainly introduces "how MySQL5.7 uses mysqldump to build gtid master and slave". In daily operation, I believe many people have doubts about how MySQL5.7 uses mysqldump to build gtid master and slave. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "how MySQL5.7 uses mysqldump to build gtid master and slave". Next, please follow the editor to study!

Recently, an old system needs to be upgraded to a new one, mainly for hardware updates.

An one-master and two-slave environment is built on the new hardware side, and the data is mainly imported by developers into the new system, because the concurrency in the process of importing data is too large and writing is too intensive, so it is necessary to stop the slave first, and after the data is imported and checked, re-build the master-slave environment.

The mysql of the master-slave environment is 5.7.12, using gtid.

Here are the specific steps, and all those without special instructions are performed from the library:

1.stop slave; # # stop slave library

2.reset slave all; # # reset Master / Slave configuration Information

3. Using mysqldump to export the database on the main library, I wrote a script to perform the export. The script name is mysqlbackup.sh.

[root@iz2ze6jo3o3bqbcongnypqz export_mysql] # more mysqlbackup.sh

#! / bin/bash

Databases= ('xxx_0042')

Basepath='/alidata1/backup/export_mysql/'

User='root'

Passwd='xxxxxx'

If [!-d "$basepath"]; then

Mkdir-p "$basepath"

Fi

For db in ${databases [*]}

Do

/ bin/nice-n 19 / usr/bin/mysqldump-u$user-p$passwd-- log-error=$basepath$db-$ (date +% Y%m%d). Log--set-gtid-purged=on-- single-transaction-- databases $db > $basepath$db-$ (date +% Y%m%d). Sql

/ bin/nice-n 19 tar zPcf $basepath$db-$ (date +% Y%m%d). Sql.tar.gz $basepath$db-$ (date +% Y%m%d) .sql

Find $basepath-mtime + 7-name "* .sql.tar.gz"-exec rm-rf {}\

Done

Rm-rf $basepath

4. The exported file already contains information about GTID_PURGED, which is very useful, meaning that those things do not need to be executed since the library is opened.

[root@iz2ze6jo3o3bqbcongnypoz export_mysql] # grep GTID_PURGED xxx_0042-20171202.sql

SET @ @ GLOBAL.GTID_PURGED='c9c73c70-c089-11e7-8544-00163e0ad76e:1-49794683'

5. Transfer the backup file to the slave server, mine is more complicated, first transfer the file to the springboard, and then to the slave, the-I parameter is used to use Aliyun's key file, and ssh is also used.

Scp-I xx_aliyun.pem root@192.168.2.71:/alidata1/backup/export_mysql/xxx_0042-20171202.sql.tar.gz / home/guoliang/

Scp-I xx_aliyun.pem / home/guoliang/xxx_0042-20171202.sql.tar.gz root@192.168.2.72:/alidata1/backup/export_mysql

Scp-I xx_aliyun.pem / home/guoliang/xxx_0042-20171202.sql.tar.gz root@192.168.2.73:/alidata1/backup/export_mysql

6.reset master; # # reset the binlog on the slave server

7. Import data

Source / alidata1/backup/export_mysql/alidata1/backup/export_mysql/xxx_0042-20171202.sql

8. Execute change master

Change master to

Master_host='192.168.2.71'

Master_port=3306

Master_user='repl'

Master_password='REPLsafxxxxx'

MASTER_AUTO_POSITION = 1

9.show slave status\ G; # # checks the status of the slave, mainly focusing on whether the following two values are consistent with the values from the above grep.

Retrieved_Gtid_Set: c9c73c70-c089-11e7-8544-00163e0ad76e:49794684-50352676

Executed_Gtid_Set: c9c73c70-c089-11e7-8544-00163e0ad76e:1-49798235

10. When Seconds_Behind_Master: 0, the data synchronization is complete.

At this point, the study of "how MySQL5.7 uses mysqldump to build gtid master and slave" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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