> 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/galera-architecture.md).

# Galera Architecture

MariaDB Galera Cluster architecture: synchronous multi-primary replication built on write-set certification, group communication, and global transaction ordering across all nodes.