MariaDB Galera Cluster Setup: High Availability Multi-Master [...]

📅 September 18, 2026 - FOR IMMEDIATE RELEASE

LONDON, UK – eServers, a premier provider of enterprise bare metal infrastructure and high-performance dedicated hosting, has officially released a technical architecture guide titled "MariaDB Galera Cluster Setup on Bare Metal." The publication offers database administrators, DevOps engineers, and infrastructure architects a comprehensive blueprint for deploying active-active, multi-master database clusters with zero single points of failure.

"When a single database server goes down, every application dependent on it fails instantly," the eServers database engineering report explains. "Traditional MySQL or MariaDB master-slave replication relies on asynchronous data transfer, where writes are committed locally before being sent to replicas. This design introduces replication lag and risks transaction loss during ungraceful failovers. MariaDB Galera Cluster eliminates this risk by delivering true synchronous multi-master replication across every node."

Why Bare Metal Infrastructure is Essential for Galera

The technical advisory emphasizes that Galera's certification-based synchronous replication is highly sensitive to network latency and disk I/O bottlenecks. In virtualized cloud environments, noisy neighbors and shared virtual disk throughput frequently introduce write certification spikes. By deploying Galera on dedicated bare metal servers equipped with high-throughput NVMe storage and dedicated CPU cores, system administrators ensure low, predictable commit latencies across all nodes.

Comprehensive 3-Node Deployment Methodology

The newly published engineering guide walks technical teams through a production-grade 3-node cluster deployment on Ubuntu 22.04 LTS. Key technical highlights include:

• Inter-Node Firewall Architecture: Clear guidelines on opening the four essential Galera network ports: TCP 3306 (client traffic), TCP/UDP 4567 (replication), TCP 4568 (Incremental State Transfer), and TCP 4444 (State Snapshot Transfer).


• wsrep Library Configuration: Detailed syntax for /etc/mysql/mariadb.conf.d/60-galera.cnf, including row-level binary logging (binlog_format=ROW) and InnoDB lock tuning.


• Cluster Bootstrapping and SST Sync: Instructions for initializing the primary cluster state via galera_new_cluster on Node 1, followed by automatic State Snapshot Transfer (SST) via rsync as Nodes 2 and 3 join the cluster.


• Health Monitoring & Load Balancing: Step-by-step SQL queries to monitor wsrep_cluster_size, wsrep_ready, and wsrep_local_state_comment, alongside recommendations for placing HAProxy or ProxySQL in front of the cluster for automated traffic distribution.

To view the complete CLI commands, Galera configuration parameters, and performance tuning guidelines, database professionals are encouraged to read the full tutorial on the official eServers website.