Detailed analysis: alternative method for backing up MySQL database _ MySQL

Detailed analysis: the alternative method for backing up MySQL databases uses MySQL for database backup. There are regular database backup methods, which share the same concept with other database servers, but have you ever thought about it, mySQL will have a simpler backup method using the file directory, and it will be faster and better.

I. data backup shortcuts

Because this method has not been verified in the official documentation, we call it a test.

Objective: to back up a MySQL database TestA in the hostA host and restore it to the hostB host

Test environment:

Operating system: WinNT4.0, MySQL3.22.34, and PHPMyAdmin 2.1.0

Install MySQL database in hostA and create TestA database

The MySQL database is installed on the hostB machine, and there is no TestA database

Procedure:

Start phpMyAdmin to check the database list in HostA and HostB. no TestA database exists in HostB.

Find the MySQL installation directory in HostA, and find the Database Directory data

In my test environment, this directory is

C: MySQLdata

Find the subdirectory of the corresponding database name

C: MySQLdataTestA

Paste and copy the file to the Data directory of HostB, which is the same as the file in the Data directory of HostB MySQL.

REFRESH The phpMyAdmin of HostB and check the database list. we can see that TestA has appeared, and the query and modification operations are normal. the backup recovery is successful.

Test conclusion: MySQL databases can be stored in the form of files, backup, recovery as long as the corresponding file directory can be restored, no need to use other tools to back up.

II. Formal method (officially recommended ):

MySQL MySQLdump is used for export. The basic usage is as follows:

MySQLdump [OPTIONS] database [tables]

If you do not specify any tables, the entire database will be exported.

Run MySQLdump -- help to obtain the option table supported by your MySQLdump version.

Note: If you run MySQLdump without the -- quick or -- opt option, MySQLdump loads the entire result set to the memory before the export result. if you are exporting a large database, this may be a problem.