What is MariaDB Galera Cluster?

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MariaDB Galera Cluster is a synchronous multi-master cluster for MariaDB. It is available on Linux only, and only supports the XtraDB/InnoDB storage engines (although there is experimental support for MyISAM - see the wsrep_replicate_myisam system variable).

Features

  • Synchronous replication
  • Active-active multi-master topology
  • Read and write to any cluster node
  • Automatic membership control, failed nodes drop from the cluster
  • Automatic node joining
  • True parallel replication, on row level
  • Direct client connections, native MariaDB look & feel

Benefits

The above features yield several benefits for a DBMS clustering solution, including:

  • No slave lag
  • No lost transactions
  • Both read and write scalability
  • Smaller client latencies

The Getting Started with MariaDB Galera Cluster page has instructions on how to get up and running with MariaDB Galera Cluster.

A great resource for Galera users is Codership on Google Groups (codership-team 'at' googlegroups (dot) com) - If you use Galera it is recommended you subscribe.

Galera Versions

MariaDB Galera Cluster is powered by:

In MariaDB 10.1 and later, the MySQL-wsrep patch has been merged into MariaDB Server. This means that the functionality of MariaDB Galera Cluster can be obtained by installing the standard MariaDB Server packages and the Galera wsrep provider library package. The following Galera version corresponds to each MariaDB Server version:

See Deciphering Galera Version Numbers for more information about how to interpret these version numbers.

Galera 4 Versions

The following table lists each version of the Galera 4 wsrep provider, and it lists which version of MariaDB each one was first released in. If you would like to install Galera 4 using yum, apt, or zypper, then the package is called galera-4.

Galera VersionReleased in MariaDB Version
26.4.3MariaDB 10.4.9
26.4.2MariaDB 10.4.4
26.4.1MariaDB 10.4.3
26.4.0MariaDB 10.4.2

Galera 3 Versions

The following table lists each version of the Galera 3 wsrep provider, and it lists which version of MariaDB each one was first released in. If you would like to install Galera 3 using yum, apt, or zypper, then the package is called galera.

Galera VersionReleased in MariaDB Version
25.3.28MariaDB 10.3.19, MariaDB 10.2.28, MariaDB 10.1.42
25.3.27MariaDB 10.3.18, MariaDB 10.2.27
25.3.26MariaDB 10.3.14, MariaDB 10.2.23, MariaDB 10.1.39
25.3.25MariaDB 10.3.12, MariaDB 10.2.20, MariaDB 10.1.38, MariaDB Galera Cluster 10.0.38, MariaDB Galera Cluster 5.5.63
25.3.24MariaDB 10.4.0, MariaDB 10.3.10, MariaDB 10.2.18, MariaDB 10.1.37, MariaDB Galera Cluster 10.0.37, MariaDB Galera Cluster 5.5.62
25.3.23MariaDB 10.3.5, MariaDB 10.2.13, MariaDB 10.1.32, MariaDB Galera Cluster 10.0.35, MariaDB Galera Cluster 5.5.60
25.3.22MariaDB 10.3.3, MariaDB 10.2.11, MariaDB 10.1.29, MariaDB Galera Cluster 10.0.33, MariaDB Galera Cluster 5.5.59
25.3.21N/A
25.3.20MariaDB 10.3.1, MariaDB 10.2.6, MariaDB 10.1.23, MariaDB Galera Cluster 10.0.31, MariaDB Galera Cluster 5.5.56
25.3.19MariaDB 10.3.0, MariaDB 10.2.3, MariaDB 10.1.20, MariaDB Galera Cluster 10.0.29, MariaDB Galera Cluster 5.5.54
25.3.18MariaDB 10.2.2, MariaDB 10.1.18, MariaDB Galera Cluster 10.0.28, MariaDB Galera Cluster 5.5.53
25.3.17MariaDB 10.1.17, MariaDB Galera Cluster 10.0.27, MariaDB Galera Cluster 5.5.51
25.3.16N/A
25.3.15MariaDB 10.2.0, MariaDB 10.1.13, MariaDB Galera Cluster 10.0.25, MariaDB Galera Cluster 5.5.49
25.3.14MariaDB 10.1.12, MariaDB Galera Cluster 10.0.24, MariaDB Galera Cluster 5.5.48
25.3.12MariaDB 10.1.11
25.3.11N/A
25.3.10N/A
25.3.9MariaDB 10.1.3, MariaDB Galera Cluster 10.0.17, MariaDB Galera Cluster 5.5.42
25.3.8N/A
25.3.7N/A
25.3.6N/A
25.3.5MariaDB 10.1.1, MariaDB Galera Cluster 10.0.10, MariaDB Galera Cluster 5.5.37
25.3.4N/A
25.3.3N/A
25.3.2MariaDB Galera Cluster 10.0.7, MariaDB Galera Cluster 5.5.35

See Also

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