What is MariaDB Galera Cluster?

MariaDB Galera Cluster is a synchronous multi-master cluster for MariaDB.

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 MySQL 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

Technology

MariaDB Galera Cluster uses the Galera library for the replication implementation. To interface with Galera replication, we have enhanced MariaDB to support the replication API definition in the wsrep API project.

The implementation of the replication API in MariaDB happens in the open source MySQL-wsrep project.

Current Progress

The MariaDB project is working on shipping the MariaDB Galera Cluster in partnership with Codership. The code is available on Launchpad

The latest release is MariaDB Galera 5.5.29. It is considered Stable. Galera is in active use by several users with good results.

See also

• About Galera Replication
• Codership: Using Galera Cluster
• Galera Use Cases
• Getting Started with MariaDB Galera Cluster

Next steps

• Fix the issues found by Buildbot
• QA
• Test plan
• Documentation