Jepsen: MariaDB Galera Cluster 12.1.2
1 Background MariaDB is a popular open source SQL database which began as a fork of MySQL. MariaDB Galera Cluster is an active-active replication system for MariaDB which allows reads and writes on every node. In 2015 this author analyzed MariaDB with Galera Cluster and found that although Galera claimed to offer Snapshot Isolation, Codership Oy intentionally designed their system without a key Snapshot Isolation property, called first-committer-wins. This allowed MariaDB with Galera Cluster to lose or create money out of thin air in a simulated bank account transfer workload. In 2025 MariaDB acquired Codership Oy, bringing Galera Cluster under the MariaDB umbrella. Galera Cluster is based on virtual synchrony group communication framework called gcomm. Transactions are initially…
