> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/galera-cluster/high-availability.md).

# High Availability

MariaDB ensures high availability with Replication for async/semi-sync data copying and Galera Cluster for sync multi-master with failover and zero data loss.