# Galera Architecture - [Introduction to Galera Architecture](https://mariadb.com/docs/galera-cluster/galera-architecture/introduction-to-galera-architecture.md): Overview of the MariaDB Galera Cluster architecture: the wsrep API, Galera Replication Plugin, group communication framework, and GTIDs enabling synchronous multi-primary replication. - [Certification-Based Replication](https://mariadb.com/docs/galera-cluster/galera-architecture/certification-based-replication.md): Certification-based replication in Galera Cluster uses optimistic transaction execution, write-set broadcasting, and deterministic certification to keep all nodes synchronized. - [Quorum Control with Weighted Votes](https://mariadb.com/docs/galera-cluster/galera-architecture/quorum-control-with-weighted-votes.md): Weighted quorum lets each Galera Cluster node carry a vote from 0 to 255, controlling which nodes remain critical for maintaining the Primary Component during failure. - [Galera Cluster Deployment Variants](https://mariadb.com/docs/galera-cluster/galera-architecture/galera-cluster-deployment-variants.md): MariaDB Galera Cluster supports multiple topologies: standard LAN clusters for high availability, WAN multi-site clusters for disaster recovery, and two-node setups with an arbitrator. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://mariadb.com/docs/galera-cluster/galera-architecture.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.