What is MariaDB Galera Cluster?

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Download MariaDB Galera Cluster

DateReleaseStatusRelease NotesChangelog
30 Sep 2013MariaDB Galera Cluster 5.5.33aStable (GA)Release NotesChangelog
30 Aug 2013MariaDB Galera Cluster 5.5.32Stable (GA)Release NotesChangelog
5 Mar 2013MariaDB Galera Cluster 5.5.29Stable (GA)Release NotesChangelog
21 Dec 2012MariaDB Galera Cluster 5.5.28aRCRelease NotesChangelog
4 Sep 2012MariaDB Galera Cluster 5.5.5AlphaRelease NotesChangelog

The current versions of the Galera wsrep provider library are 26.4.7 for Galera 4 and 25.3.32 for Galera 3.
For convenience, packages containing these libraries are included in the MariaDB YUM and APT repositories.

Contents

  1. Features
  2. Benefits
  3. Technology
  4. Current Progress
  5. See also
  6. Next steps

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

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.

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 5.5.33a. It is considered Stable. Galera is in active use by several users with good results.

See also

Next steps

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

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