Jepsen

• Galera's Consistency Claims Don't Survive Contact With a Healthy Cluster March 17, 2026

  Jepsen's analysis of MariaDB Galera Cluster 12.1.2 found P4 (Lost Update) anomalies in a healthy, fault-free cluster -- and documented that Galera's consistency claims are materially weaker than its own documentation states. If your production workload uses read-modify-write patterns on Galera, you need to read this.