How to migrate MySQL to MariaDB on Linux?-Mysql Tutorial-php.cn

如何在 Linux 上将 MySQL 迁移到 MariaDB？

This article will help you migrate your database from MySQL to MariaDB because MySQL to MariaDB binary compatibility is very simple during the migration process.

After Oracle acquired MySQL, the community drove the results of such a movement and developed a new database called MariaDB. MariaDB is open source and compatible with MySQL. Most Linux distributions (RH, CentOS, Fedora) have started using MariaDB support as a drop-in replacement for MySQL.

If we want to migrate the database from MySQL to MariaDB, then this article will be helpful.

Preparing the MySQL database and tables

We create a test MySQL database and overall tables for demonstration purposes. If you have a database and tables in your environment, you can skip this step.

# mysql -uroot -p

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Create a database and tables

mysql> Create database test1;
mysql> use test1;
mysql> create table tab1(name varchar(30), owner varchar(30), species varchar(20), sex char(1));
Query OK, 0 rows affected (0.02 sec)

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In addition, we will add some records to test the data

mysql> insert into tab1 values(&#39;Chandra&#39;,&#39;Prakash&#39;,&#39;Kadarla&#39;,&#39;m&#39;),(&#39;Srinvas&#39;,&#39;Kadarla&#39;,&#39;Chary&#39;,&#39;m&#39;);
Query OK, 2 rows affected (0.00 sec)
Records: 2 Duplicates: 0 Warnings: 0
Then quit from the MySQL.

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Backup of MySQL database

We need to use the command – MySQL dump to back up the MySQL database

# mysqldump --all-databases --user=root --password --master-data > backupDB.sql

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For security reasons, we will obtain some configuration files of MySQL elsewhere in the system

# cp /etc/mysql/my.cnf /opt/my.cnf.bak

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Uninstall the MySQL package

us MySQL will be uninstalled using the following command –

# service mysqld stop
# yum remove mysql-server mysql-client mysql-common

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Install MariaDB package

MariaDB has been replaced by MySQL on all major Linux distribution official repositories. You can add the official repository even if you are using an older version of Linux.

Create the file in the yum repos directory

# sudo vi /etc/yum.repos.d/MariaDB.repo

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Add the following content to the file and save it

[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/5.5/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

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To install the Maria-DB server and client, run the following commands .

# yum install MariaDB-server MariaDB-client
Loaded plugins: fastestmirror, langpacks
base                                  | 3.6 kB 00:00
extras                                | 3.4 kB 00:00
mariadb                               | 2.9 kB 00:00
updates                               | 3.4 kB 00:00
   --> Restarting Dependency Resolution with new changes.
   --> Running transaction check
   ---> Package MariaDB-shared.x86_64 0:5.5.49-1.el7.centos will be obsoleting
   ---> Package mariadb-libs.x86_64 1:5.5.35-3.el7 will be obsoleted
   --> Finished Dependency Resolution
Dependencies Resolved
========================================================================================
Package                         Arch          Version                      Repository    Size
========================================================================================
Installing:
   MariaDB-client             x86_64          5.5.49-1.el7.centos          mariadb          8.6 M
   MariaDB-server             x86_64          5.5.49-1.el7.centos          mariadb          40 M
   MariaDB-shared             x86_64          5.5.49-1.el7.centos          mariadb          1.0 M
      replacing mariadb-libs.x86_64 1:5.5.35-3.el7
Installing for dependencies:
   MariaDB-common             x86_64          5.5.49-1.el7.centos          mariadb          23 k
   perl-Compress-Raw-Bzip2    x86_64          2.061-3.el7                  base             32 k
   perl-Compress-Raw-Zlib     x86_64          1:2.061-4.el7                base             57 k
   perl-DBI                   x86_64          1.627-4.el7                  base             802 k
   perl-Data-Dumper           x86_64          2.145-3.el7                  base             47 k
   perl-IO-Compress           noarch          2.061-2.el7                  base             260 k
   perl-Net-Daemon            noarch          0.48-5.el7                   base             51 k
   perl-PlRPC                 noarch          0.2020-14.el7                base             36 k
Transaction Summary
========================================================================================
Install 3 Packages (+8 Dependent packages)
Total download size: 51 M
Is this ok [y/d/N]: y
Downloading packages:
warning: /var/cache/yum/x86_64/7/mariadb/packages/MariaDB-5.5.49-centos7-x86_64-common.rpm: Header V4 DSA/SHA1 Signature, key ID 1bb943db: NOKEY
Public key for MariaDB-5.5.49-centos7-x86_64-common.rpm is not installed
(1/11): MariaDB-5.5.49-centos7-x86_64-common.rpm             | 23 kB 00:00:01
(2/11): MariaDB-5.5.49-centos7-x86_64-client.rpm             | 8.6 MB 00:00:12
warning: /var/cache/yum/x86_64/7/base/packages/perl-Compress-Raw-Bzip2-2.061-3.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for perl-Compress-Raw-Bzip2-2.061-3.el7.x86_64.rpm is not installed
(3/11): perl-Compress-Raw-Bzip2-2.061-3.el7.x86_64.rpm       | 32 kB 00:00:00
(4/11): perl-Compress-Raw-Zlib-2.061-4.el7.x86_64.rpm        | 57 kB 00:00:00
(5/11): perl-Data-Dumper-2.145-3.el7.x86_64.rpm              | 47 kB 00:00:00
(6/11): perl-IO-Compress-2.061-2.el7.noarch.rpm              | 260 kB 00:00:00
(7/11): perl-Net-Daemon-0.48-5.el7.noarch.rpm                | 51 kB 00:00:00
(8/11): perl-DBI-1.627-4.el7.x86_64.rpm                      | 802 kB 00:00:00
(9/11): perl-PlRPC-0.2020-14.el7.noarch.rpm                  | 36 kB 00:00:00
(10/11): MariaDB-5.5.49-centos7-x86_64-shared.rpm            | 1.0 MB 00:00:01
Total download size: 51 M
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
   Installing : MariaDB-common-5.5.49-1.el7.centos.x86_64          1/12
   Installing : perl-Data-Dumper-2.145-3.el7.x86_64                2/12
   Installing : MariaDB-client-5.5.49-1.el7.centos.x86_64          3/12
   Installing : 1:perl-Compress-Raw-Zlib-2.061-4.el7.x86_64        4/12
   Installing : perl-Net-Daemon-0.48-5.el7.noarch                  5/12
   Installing : perl-Compress-Raw-Bzip2-2.061-3.el7.x86_64         6/12
   Installing : perl-IO-Compress-2.061-2.el7.noarch                7/12
   Installing : perl-PlRPC-0.2020-14.el7.noarch                    8/12
   Installing : perl-DBI-1.627-4.el7.x86_64                        9/12
Installed:
   MariaDB-client.x86_64 0:5.5.49-1.el7.centos       MariaDB-server.x86_64 0:5.5.49-1.el7.centos
   MariaDB-shared.x86_64 0:5.5.49-1.el7.centos
Dependency Installed:
   MariaDB-common.x86_64 0:5.5.49-1.el7.centos       perl-Compress-Raw-Bzip2.x86_64 0:2.061-3.el7
   perl-Compress-Raw-Zlib.x86_64 1:2.061-4.el7       perl-DBI.x86_64 0:1.627-4.el7
   perl-Data-Dumper.x86_64 0:2.145-3.el7             perl-IO-Compress.noarch 0:2.061-2.el7
   perl-Net-Daemon.noarch 0:0.48-5.el7               perl-PlRPC.noarch 0:0.2020-14.el7
Replaced:
   mariadb-libs.x86_64 1:5.5.35-3.el7
Complete!

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After installing all the required packages, we need to set a password for the root user account. Root password recovery from MySQL backup configuration files.

# cp /opt/my.cnf /etc/mysql/

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Now, we need to run the following command to restart the MariaDB service.

# service mariadb start

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Import MySQL database

We must import the database we backed up from MySQL into MariaDB

# mysql -u root -p < backupDB.sql

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Enter the password of the root user, and then the database will be imported to MariaDB

We need to check whether the database is restored correctly.

Please follow the following command –

# mysql -u root -p
MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test1              |
+--------------------+
3 rows in set (0.00 sec)
MariaDB [(none)]> use test1;
MariaDB [test01]> select * from tab1;
select * from tab1;
+---------+---------+---------+------+
| name    | owner   | species | sex  |
+---------+---------+---------+------+
| Chandra | Prakash | Kadarla |    m |
| Srinvas | Kadarla | Chary   |    m |
+---------+---------+---------+------+
2 rows in set (0.00 sec)

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Now the migration from MySQL to MariaDB has been successfully completed.

After we run the command and follow the tutorial, we can migrate the database from MySQL to MariaDB in simple steps, where MariaDB has a lot of new features compared to MySQL. In the tutorial above I used a simple scenario to test the migration configuration.

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