Mysql database compressed backup_ Summary of MySQL backup compression and database recovery methods

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Generally, we pass mysqldump To backup MySQL data library , And upload to other backup machines . If the database is large , The backup transmission may be slow , So we try to make the backup file smaller .

When writing an automatic backup script , It is better to compress the backup results directly , You can also recover directly from a compressed backup . How to use bzip2 and gzip Compress mysql Backup file .

Backup and use bzip Compress ：

The code is as follows

mysqldump | bzip2 > outputfile.sql.bz2

from bzip2 Backup recovery :

The code is as follows

bunzip2 < outputfile.sql.bz2 | mysql < mysql options>

Backup and use gzip Compress ：

The code is as follows

mysqldump | gzip > outputfile.sql.gz

from gzip Backup recovery ：

gunzip < outputfile.sql.gz | mysql < mysql options>

Supplement this article

Back up the specified database

The code is as follows

mysqldump -h hostname -u username -p databasename > db.sql If the path is not specified explicitly, it is assigned to the user's working directory ：C:Documents and SettingsAdministrator

You can specify the backup directory explicitly ：

The code is as follows

mysqldump -u root -p mydb -h 192.168.14.204 > D:mydb.sql

explain ：

-p After that, you don't need to enter a password , You need to enter the password after clicking the Enter key .

Direct will MySQL Database compression backup

The code is as follows

mysqldump -h hostname -u username -p databasename | gzip > db.sql.gz

explain ：

gzip yes linux Compressor under , So in windows It can't be used in the environment .

Backup MySQL A database ( some ) surface

The code is as follows

mysqldump -h hostname -u username -p databasename table1 table2 > db.sql

Backup multiple files at the same time MySQL database

The code is as follows

mysqldump -h hostname -u username -p –databases db1 db2 db3 > dbs.sql

Back up all databases on the server

The code is as follows

mysqldump –all-databases > allbackupfile.sql

test ：

The code is as follows

mysqldump –all-databases -u root -p > allbackupfile.sql

Enter password: ******windows You can use Mysql Query Browser Of File–》Open Script To execute the backup script , You can also use the following command to restore directly ：

The code is as follows

mysql -h hostname -u username -p databasename < backupfile.sql

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