Difference between revisions of "Backing up and restoring MySQL database"
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[[Main Page|Home]] > [[CentOS]] > [[CentOS 6.x]] > [[Mariadb configuration|MariaDB configuration]] > [[Backing up and restoring MySQL database]] | |||
==MySQL database backup== | ==MySQL database backup== | ||
'''For large production databases refer [[CentOS 8.x mariadb taking backup of large production databases]]''' | |||
To backup MySQL database one can use '<tt>mysqldump</tt>' program. Syntax for mysqldump is: | To backup MySQL database one can use '<tt>mysqldump</tt>' program. Syntax for mysqldump is: | ||
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mysqldump -u <mysql_username> -p <database_name> | bzip2 > <database_name>.sql.bz2 | mysqldump -u <mysql_username> -p <database_name> | bzip2 > <database_name>.sql.bz2 | ||
</pre> | </pre> | ||
===Dump each database in separate dump file=== | |||
If a system has multiple MySQL databases we can dump each on a separate file using: | |||
<pre> | |||
#!/bin/bash | |||
cd /opt | |||
for A in $(mysql -N --batch -e 'show databases'); do | |||
mysqldump --single-transaction --quick --skip-lock-tables $A | bzip2 > database-backups/$A.sql.bz2 ; | |||
done | |||
exit 0 | |||
</pre> | |||
We can call such backup script via [[CentOS 7.x rsnapshot|rsnapshot]] to ensure that during every run of [[CentOS 7.x rsnapshot|rsnapshot]] we get a separate DB backup file for each database. | |||
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[[Main Page|Home]] > [[CentOS]] > [[CentOS 6.x]] > [[Mariadb configuration|MariaDB configuration]] > [[Backing up and restoring MySQL database]] | |||
Latest revision as of 03:06, 26 February 2024
Home > CentOS > CentOS 6.x > MariaDB configuration > Backing up and restoring MySQL database
MySQL database backup
For large production databases refer CentOS 8.x mariadb taking backup of large production databases
To backup MySQL database one can use 'mysqldump' program. Syntax for mysqldump is:
mysqldump -u <mysql_username> -p <database_name> > <database_name>.sql
To automatically compress the database before it is stored on disk the output of mysqldump can be passed through bzip2 as:
mysqldump -u <mysql_username> -p <database_name> | bzip2 > <database_name>.sql.bz2
Dump each database in separate dump file
If a system has multiple MySQL databases we can dump each on a separate file using:
#!/bin/bash
cd /opt
for A in $(mysql -N --batch -e 'show databases'); do
mysqldump --single-transaction --quick --skip-lock-tables $A | bzip2 > database-backups/$A.sql.bz2 ;
done
exit 0
We can call such backup script via rsnapshot to ensure that during every run of rsnapshot we get a separate DB backup file for each database.
Restoring MySQL database
To restore MySQL database we can use 'mysql' command line client. Command to restore database is:
cat <dump_file>.sql | mysql -u <mysql_username> -p <database_name>
To restore a compressed database along with password we can take help of 'bunzip2' and 'sshpass' utilities in following manner:
bunzip2 -c <dump_file>.sql.bz2 | sshpass -p <mysql_database_password> mysql -u <mysql_username> -p <database_name>
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