Galera Cluster review
A focused, free clustering option for highly available MySQL and MariaDB workloads.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Galera Cluster is an open-source database clustering technology for MySQL and MariaDB. It provides synchronous, multi-primary replication, allowing reads and writes on any cluster node while maintaining consistent data across the cluster. The product is aimed at organizations running high-availability transactional workloads that need database redundancy and scalable read/write access. It supports Linux and self-hosted environments, with hybrid deployment across cloud environments, data centers, and wide-area networks.
The published feature set focuses on keeping cluster nodes synchronized and available. Certification-based replication, automatic node provisioning, hot standby, and node failover support multi-primary operations, while multi-threaded replication can help with replication processing. State Snapshot Transfers and Incremental State Transfers support node synchronization, and streaming replication is designed for large or long-running transactions. Cross-region deployment and change data capture support are also listed in the category specifications.
Galera Cluster is available as open-source software with a free plan, making it a direct fit for teams seeking MySQL or MariaDB clustering without a listed license charge. Its main trade-off is focus: the supported database coverage is limited to MySQL and MariaDB, and the platform scope centers on Linux and self-hosted deployment. Teams with those databases and a need for synchronous multi-primary failover should consider it; organizations seeking broader database coverage or wider integration options should look elsewhere. MariaDB also offers Enterprise Cluster under its enterprise offerings with contact-sales pricing.
Galera Cluster pros and cons
- Where it wins
- Synchronous multi-primary replication supports reads and writes on any node
- Automatic provisioning, hot standby, and failover support cluster resilience
- State transfers and streaming replication handle large or long-running transactions
- Where it doesn't
- Supports only MySQL and MariaDB databases
- Linux and self-hosted deployment require infrastructure ownership
- Integration coverage is narrower than broader database replication platforms
Galera Cluster fact sheet, pricing and score →
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